Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 815 prefixes
786 of the 786 possible NXX blocks are assigned in area code 815 (100.0% of capacity), spread across 200 rate centers and 53 holders. The largest holders are ILLINOIS BELL TEL CO (157 blocks, 20.0%), FRONTIER NORTH, INC. - IL (133 blocks, 16.9%), LEVEL 3 COMMUNICATIONS, LLC - IL (76 blocks, 9.7%). Grouped by brand, AT&T accounts for 227 blocks; brand-attributable holders cover 83% of the code, and the rest are CLECs, VoIP wholesalers and regional carriers that trade under their own names. The assignment records here run from 2001-01-24 to 2025-05-16, with 48 blocks handed out in 2001 alone. 519 blocks (66%) are in thousands-block pooling, meaning the block is shared between carriers in 1,000-number lots rather than held whole – which is why a single NXX can serve several carriers at once. 39 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
786 assigned blocks of 786
200 rate centers
53 holders of record
66% in thousands-block pooling
Largest holders in 815
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| ILLINOIS BELL TEL CO | AT&T | 157 | 20% |
| FRONTIER NORTH, INC. - IL | Frontier | 133 | 16.9% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | Lumen | 76 | 9.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Verizon | 50 | 6.4% |
| AERO NORTH COMMUNICATIONS, INC. - IL | – | 43 | 5.5% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 42 | 5.3% |
| T-MOBILE USA, INC. | T-Mobile | 40 | 5.1% |
| UNITED STATES CELLULAR - IL | – | 23 | 2.9% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | AT&T | 22 | 2.8% |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | – | 17 | 2.2% |
| METROPCS, INC. | T-Mobile | 17 | 2.2% |
| RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | – | 16 | 2% |
Names are printed as they appear in the assignment records, which is the legal entity rather than the brand. Holding a block is not the same as serving the numbers in it: portability moves numbers between carriers and pooling splits a block between several.
Rate centers with their own page
Rate centers where at least three blocks are assigned, excluding the numbered metro zone codes. The remainder are in the full table below.
ROCKFORD 89JOLIET 62KANKAKEE 33WOODSTOCK 28DE KALB 24LOCKPORT 18FREEPORT 18MCHENRY 18CRYSTAL LK 16STERLING 15PLAINFIELD 15MORRIS 12OTTAWA 11LA SALLE 9OGLESBY 9DIXON 9PRINCETON 9MINOOKA 8NEW LENOX 7STREATOR 7BELVIDERE 7GARDNER 6FRANKFORT 6LA GRANGE 6CRESCENTCY 6MOMENCE 6COAL CITY 5UTICA 5MANHATTAN 5PONTIAC 5MARSEILLES 5MENDOTA 5ROCHELLE 5SYCAMORE 5GALENA 4SENECA 4ELWOOD 4MORRISON 4WATSEKA 4GRANT PARK 4HARVARD 4MILLEDGEVL 3BYRON 3EARLVILLE 3GILMAN 3ROSCOE 3SAVANNA 3SHANNON 3SO BELOIT 3BRAIDWOOD 3PEARL CITY 3APPLERIVER 3LANARK 3SOMONAUK 3PROPHETSTN 3MARENGO 3OREGON 3ROCKTON 3CHADWICK 3ELIZABETH 3
All 786 assigned blocks
One row per NXX. “Pooled” means carriers draw 1,000-number lots from the block rather than holding all 10,000, so a pooled prefix can belong to several carriers at once. “Not in service” means assigned but not yet open for calls – a caller ID from one of those is necessarily spoofed. The holder column gives the brand where the legal entity maps to one; the full legal names are in the holders table above, exactly as NANPA records them.
| Prefix | Holder of record | Rate center | Assigned | Pooled | In service |
|---|---|---|---|---|---|
| 815-200 | Windstream | LA SALLE | 2006-06-20 | yes | yes |
| 815-201 | Bandwidth | SHERIDAN | 2012-08-15 | yes | yes |
| 815-202 | AT&T | OGLESBY | 2008-04-08 | yes | yes |
| 815-203 | Spok | JOLIET | – | – | yes |
| 815-204 | Spok | CRYSTAL LK | – | – | yes |
| 815-205 | Lumen | COAL CITY | 2014-01-31 | yes | yes |
| 815-206 | AT&T | WOODSTOCK | – | yes | yes |
| 815-207 | AT&T | JOLIET | – | yes | yes |
| 815-208 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | FULTON | – | yes | yes |
| 815-209 | Lumen | ROCKFORD | 2002-02-04 | yes | yes |
| 815-210 | AT&T | JOLIET | – | – | yes |
| 815-212 | T-Mobile | JOLIET | – | yes | yes |
| 815-213 | UNITED STATES CELLULAR - IL | STERLING | 2004-09-29 | yes | yes |
| 815-214 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | KANKAKEE | – | yes | yes |
| 815-215 | FIRST COMMUNICATIONS, LLC | NEW LENOX | 2002-02-04 | yes | yes |
| 815-216 | Verizon | KANKAKEE | – | yes | yes |
| 815-217 | DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL | DE KALB | – | yes | yes |
| 815-218 | Verizon | ROCKFORD | – | – | yes |
| 815-219 | T-Mobile | CRYSTAL LK | 2006-06-06 | yes | yes |
| 815-220 | AT&T | LA SALLE | – | yes | yes |
| 815-221 | AT&T | LOCKPORT | – | yes | yes |
| 815-222 | Verizon | ROCKFORD | – | – | yes |
| 815-223 | AT&T | LA SALLE | – | – | yes |
| 815-224 | AT&T | LA SALLE | – | – | yes |
| 815-225 | Frontier | MILLEDGEVL | – | – | yes |
| 815-226 | AT&T | ROCKFORD | – | – | yes |
| 815-227 | AT&T | ROCKFORD | – | yes | yes |
| 815-228 | AT&T | OGLESBY | – | – | yes |
| 815-229 | AT&T | ROCKFORD | – | – | yes |
| 815-230 | Lumen | PLAINFIELD | – | yes | yes |
| 815-231 | AT&T | ROCKFORD | – | yes | yes |
| 815-232 | Frontier | FREEPORT | – | – | yes |
| 815-233 | Frontier | FREEPORT | – | – | yes |
| 815-234 | Frontier | BYRON | – | yes | yes |
| 815-235 | Frontier | FREEPORT | – | – | yes |
| 815-236 | AT&T | WOODSTOCK | – | – | yes |
| 815-237 | AT&T | GARDNER | – | yes | yes |
| 815-238 | Verizon | FREEPORT | – | – | yes |
| 815-239 | Frontier | PECATONICA | – | yes | yes |
| 815-240 | Charter | ROCK CUT | 2010-10-18 | yes | yes |
| 815-241 | American Messaging | NORTHBROOK | – | – | yes |
| 815-242 | Bandwidth | MINOOKA | 2014-05-02 | yes | yes |
| 815-243 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-244 | Brightspeed | MT CARROLL | – | – | yes |
| 815-245 | AT&T | WOODSTOCK | – | – | yes |
| 815-246 | Frontier | EARLVILLE | – | yes | yes |
| 815-247 | Frontier | SEWARD | – | yes | yes |
| 815-248 | Frontier | DURAND | – | yes | yes |
| 815-249 | Frontier | GRANDRIDGE | – | yes | yes |
| 815-250 | Comcast | LA SALLE | 2006-08-25 | yes | yes |
| 815-251 | Brightspeed | NELSON | – | yes | yes |
| 815-252 | AT&T | OGLESBY | – | – | yes |
| 815-253 | Frontier | KEMPTON | – | yes | yes |
| 815-254 | AT&T | PLAINFIELD | – | – | yes |
| 815-255 | Windstream | MINOOKA | 2009-11-03 | yes | yes |
| 815-256 | STELLE TEL. CO. | STELLE | – | – | yes |
| 815-257 | Verizon | STREATOR | – | – | yes |
| 815-258 | AT&T | JOLIET | – | – | yes |
| 815-259 | Brightspeed | THOMSON | – | – | yes |
| 815-260 | T-Mobile | JOLIET | – | yes | yes |
| 815-261 | Verizon | CRYSTAL LK | – | yes | yes |
| 815-262 | Verizon | ROCKFORD | – | – | yes |
| 815-263 | Verizon | KANKAKEE | – | – | yes |
| 815-264 | Frontier | WATERMAN | – | yes | yes |
| 815-265 | AT&T | GILMAN | – | yes | yes |
| 815-266 | Frontier | FREEPORT | – | yes | yes |
| 815-267 | Verizon | PLAINFIELD | – | yes | yes |
| 815-268 | AT&T | ONARGA | – | yes | yes |
| 815-269 | Frontier | DANFORTH | – | yes | yes |
| 815-270 | Charter | ROSCOE | 2007-04-24 | yes | yes |
| 815-271 | Verizon | MCHENRY | – | yes | yes |
| 815-272 | Verizon | JOLIET | – | yes | yes |
| 815-273 | Brightspeed | SAVANNA | – | – | yes |
| 815-274 | AT&T | JOLIET | – | – | yes |
| 815-275 | Verizon | FREEPORT | – | – | yes |
| 815-276 | AT&T | CRYSTAL LK | – | yes | yes |
| 815-277 | AT&T | FRANKFORT | – | yes | yes |
| 815-278 | Verizon | KANKAKEE | – | yes | yes |
| 815-279 | American Messaging | KANKAKEE | – | – | yes |
| 815-280 | AT&T | JOLIET | – | yes | yes |
| 815-281 | UNITED STATES CELLULAR - IL | GALENA | 2004-06-15 | yes | yes |
| 815-282 | AT&T | ROCKFORD | – | – | yes |
| 815-283 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | WATERMAN | 2010-03-05 | yes | yes |
| 815-284 | Brightspeed | DIXON | – | – | yes |
| 815-285 | Brightspeed | DIXON | – | – | yes |
| 815-286 | Frontier | HINCKLEY | – | yes | yes |
| 815-287 | AT&T | VERONA | – | yes | yes |
| 815-288 | Brightspeed | DIXON | – | – | yes |
| 815-289 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-290 | AT&T | MINOOKA | 2006-02-10 | yes | yes |
| 815-291 | UNITED STATES CELLULAR - IL | FREEPORT | – | yes | yes |
| 815-292 | BERGEN TEL. CO. - IL | SO BERGEN | – | – | yes |
| 815-293 | AT&T | LOCKPORT | – | yes | yes |
| 815-294 | Spok | LA GRANGE | – | – | yes |
| 815-295 | T-Mobile | KANKAKEE | – | yes | yes |
| 815-296 | Telnyx | ROCKFORD | 2019-11-20 | yes | yes |
| 815-297 | Frontier | FREEPORT | – | yes | yes |
| 815-298 | Verizon | ROCKFORD | – | – | yes |
| 815-299 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-300 | AT&T | NEW LENOX | 2010-12-22 | yes | yes |
| 815-301 | Lumen | CRYSTAL LK | – | yes | yes |
| 815-302 | T-Mobile | JOLIET | – | yes | yes |
| 815-303 | Verizon | PRINCETON | – | – | yes |
| 815-304 | Lumen | KANKAKEE | – | yes | yes |
| 815-305 | Lumen | GARDNER | – | yes | yes |
| 815-306 | Lumen | LOCKPORT | – | yes | yes |
| 815-307 | Lumen | MCHENRY | – | yes | yes |
| 815-308 | Lumen | WOODSTOCK | – | yes | yes |
| 815-309 | AERO NORTH COMMUNICATIONS, INC. - IL | SHANNON | 2006-07-18 | – | yes |
| 815-310 | Lumen | UTICA | – | yes | yes |
| 815-312 | Onvoy | ROCKFORD | 2008-12-15 | yes | yes |
| 815-313 | Lumen | OTTAWA | – | yes | yes |
| 815-314 | Lumen | MANHATTAN | – | yes | yes |
| 815-315 | Lumen | ROCKFORD | – | yes | yes |
| 815-316 | Lumen | ROCKFORD | – | – | yes |
| 815-317 | Lumen | CRESCENTCY | – | yes | yes |
| 815-318 | Lumen | MORRIS | – | yes | yes |
| 815-319 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-320 | Peerless | NEW LENOX | 2009-04-28 | yes | yes |
| 815-321 | Onvoy | WOODSTOCK | – | yes | yes |
| 815-322 | Lumen | MCHENRY | – | yes | yes |
| 815-323 | Lumen | BELVIDERE | 2005-02-10 | yes | yes |
| 815-324 | MCC TELEPHONY LLC | OTTAWA | 2010-01-08 | yes | yes |
| 815-325 | AT&T | JOLIET | – | – | yes |
| 815-326 | AT&T | OGLESBY | – | yes | yes |
| 815-327 | Lumen | PLAINFIELD | – | – | yes |
| 815-328 | Lumen | LOCKPORT | – | yes | yes |
| 815-329 | AT&T | ROCKFORD | 2013-03-11 | yes | yes |
| 815-330 | FIRST COMMUNICATIONS, LLC | CRESCENTCY | – | – | yes |
| 815-331 | Lumen | MCHENRY | – | yes | yes |
| 815-332 | Frontier | CHERRY VLY | – | yes | yes |
| 815-333 | Lumen | WOODSTOCK | – | yes | yes |
| 815-334 | AT&T | WOODSTOCK | – | yes | yes |
| 815-335 | Frontier | WINNEBAGO | – | yes | yes |
| 815-336 | Frontier | COLETA | – | yes | yes |
| 815-337 | AT&T | WOODSTOCK | – | – | yes |
| 815-338 | AT&T | WOODSTOCK | – | – | yes |
| 815-339 | Frontier | GRANVILLE | – | yes | yes |
| 815-340 | Comcast | LA MOILLE | 2006-08-25 | yes | yes |
| 815-341 | AT&T | JOLIET | – | – | yes |
| 815-342 | AT&T | JOLIET | – | – | yes |
| 815-343 | AT&T | OGLESBY | – | – | yes |
| 815-344 | AT&T | MCHENRY | – | – | yes |
| 815-345 | Lumen | WOODSTOCK | – | yes | yes |
| 815-346 | Lumen | GARDNER | – | – | yes |
| 815-347 | Verizon | WOODSTOCK | – | – | yes |
| 815-348 | Windstream | KANKAKEE | 2009-10-16 | yes | yes |
| 815-349 | Verizon | MCHENRY | – | yes | yes |
| 815-350 | AERO NORTH COMMUNICATIONS, INC. - IL | FRANKLIGRV | – | – | yes |
| 815-351 | Verizon | KANKAKEE | – | – | yes |
| 815-352 | Lumen | KANKAKEE | – | yes | yes |
| 815-353 | Verizon | WOODSTOCK | – | – | yes |
| 815-354 | Verizon | WOODSTOCK | – | – | yes |
| 815-355 | Verizon | WOODSTOCK | – | – | yes |
| 815-356 | AT&T | CRYSTAL LK | – | – | yes |
| 815-357 | AT&T | SENECA | – | yes | yes |
| 815-358 | C-R TELEPHONE CO. | CORNELL | – | – | yes |
| 815-359 | Brightspeed | HARMON | – | yes | yes |
| 815-360 | AERO NORTH COMMUNICATIONS, INC. - IL | SUBLETTE | – | – | yes |
| 815-361 | Lumen | MANHATTAN | – | yes | yes |
| 815-362 | Frontier | GERMAN VLY | – | yes | yes |
| 815-363 | AT&T | MCHENRY | – | – | yes |
| 815-364 | Lumen | MORRIS | – | yes | yes |
| 815-365 | Frontier | REDDICK | – | yes | yes |
| 815-366 | Lumen | OTTAWA | – | yes | yes |
| 815-367 | Frontier | WINSLOW | – | yes | yes |
| 815-368 | Frontier | LOSTANT | – | yes | yes |
| 815-369 | Frontier | LENA | – | yes | yes |
| 815-370 | Verizon | KANKAKEE | – | – | yes |
| 815-371 | Lumen | UTICA | – | yes | yes |
| 815-372 | AT&T | LOCKPORT | – | yes | yes |
| 815-373 | Windstream | ELWOOD | 2009-11-04 | yes | yes |
| 815-374 | Windstream | DWIGHT | 2009-11-04 | yes | yes |
| 815-375 | UNITED STATES CELLULAR - IL | DE KALB | – | yes | yes |
| 815-376 | Frontier | OHIO | – | yes | yes |
| 815-377 | Lumen | CRESCENTCY | – | – | yes |
| 815-378 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-379 | Frontier | WALNUT | – | yes | yes |
| 815-380 | Lumen | STERLING | – | yes | yes |
| 815-381 | AT&T | ROCKFORD | – | – | yes |
| 815-382 | AT&T | WOODSTOCK | – | – | yes |
| 815-383 | AT&T | CRESCENTCY | – | – | yes |
| 815-384 | Frontier | CRESTON | – | yes | yes |
| 815-385 | AT&T | MCHENRY | – | – | yes |
| 815-386 | Verizon | KANKAKEE | – | yes | yes |
| 815-387 | AT&T | ROCKFORD | – | – | yes |
| 815-388 | T-Mobile | MCHENRY | – | yes | yes |
| 815-389 | AT&T | SO BELOIT | – | – | yes |
| 815-390 | Comcast | BRAIDWOOD | 2004-10-14 | yes | yes |
| 815-391 | AT&T | ROCKFORD | – | yes | yes |
| 815-392 | KINSMAN MUTUAL TEL. CO. | KINSMAN | – | – | yes |
| 815-393 | Frontier | MONROE CTR | – | yes | yes |
| 815-394 | AT&T | ROCKFORD | – | yes | yes |
| 815-395 | AT&T | ROCKFORD | – | – | yes |
| 815-396 | Frontier | STEWARD | – | yes | yes |
| 815-397 | AT&T | ROCKFORD | – | – | yes |
| 815-398 | AT&T | ROCKFORD | – | – | yes |
| 815-399 | AT&T | ROCKFORD | – | – | yes |
| 815-400 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | MORRISON | 2010-02-15 | yes | yes |
| 815-401 | Lumen | KANKAKEE | – | yes | yes |
| 815-402 | Lumen | GALENA | – | yes | yes |
| 815-403 | T-Mobile | MCHENRY | – | yes | yes |
| 815-404 | T-Mobile | CRYSTAL LK | – | yes | yes |
| 815-405 | T-Mobile | JOLIET | – | yes | yes |
| 815-406 | Frontier | BYRON | – | yes | yes |
| 815-407 | AT&T | LOCKPORT | – | yes | yes |
| 815-408 | Bandwidth | UTICA | – | yes | yes |
| 815-409 | Verizon | JOLIET | 2005-08-18 | yes | yes |
| 815-410 | Lumen | LA SALLE | 2002-02-04 | yes | yes |
| 815-412 | Lumen | FRANKFORT | – | yes | yes |
| 815-413 | FIRST COMMUNICATIONS, LLC | MORRIS | – | – | yes |
| 815-414 | AT&T | EARLVILLE | 2004-10-14 | yes | yes |
| 815-415 | AT&T | SENECA | – | yes | yes |
| 815-416 | AT&T | MORRIS | – | yes | yes |
| 815-417 | AT&T | BRAIDWOOD | – | yes | yes |
| 815-418 | FIRST COMMUNICATIONS, LLC | MANHATTAN | – | yes | yes |
| 815-419 | Verizon | PONTIAC | – | yes | yes |
| 815-420 | Onvoy | ROCKFORD | – | yes | yes |
| 815-421 | AT&T | HERSCHER | – | yes | yes |
| 815-422 | AT&T | ST ANNE | – | yes | yes |
| 815-423 | AT&T | ELWOOD | – | yes | yes |
| 815-424 | AT&T | ELWOOD | – | yes | yes |
| 815-425 | Lumen | CRYSTAL LK | – | – | yes |
| 815-426 | AT&T | HERSCHER | – | yes | yes |
| 815-427 | AT&T | ST ANNE | – | yes | yes |
| 815-428 | Frontier | MARTINTON | – | yes | yes |
| 815-429 | Frontier | SHELDON | – | yes | yes |
| 815-430 | FIRST COMMUNICATIONS, LLC | MCHENRY | – | – | yes |
| 815-431 | AT&T | OTTAWA | – | yes | yes |
| 815-432 | AT&T | WATSEKA | – | yes | yes |
| 815-433 | AT&T | OTTAWA | – | – | yes |
| 815-434 | AT&T | OTTAWA | – | – | yes |
| 815-435 | Frontier | BEAVERVL | – | yes | yes |
| 815-436 | AT&T | PLAINFIELD | – | – | yes |
| 815-437 | Frontier | PUTNAM | – | yes | yes |
| 815-438 | Frontier | TAMPICO | – | yes | yes |
| 815-439 | AT&T | PLAINFIELD | – | – | yes |
| 815-440 | Verizon | DIXON | – | – | yes |
| 815-441 | Verizon | STERLING | – | – | yes |
| 815-442 | TONICA TEL. CO. | TONICA | – | – | yes |
| 815-443 | Frontier | PEARL CITY | – | yes | yes |
| 815-444 | AT&T | CRYSTAL LK | – | – | yes |
| 815-445 | Frontier | MANLIUS | – | yes | yes |
| 815-446 | Frontier | CEDARPOINT | – | yes | yes |
| 815-447 | Frontier | DEPUE | – | yes | yes |
| 815-448 | AT&T | MAZON | – | yes | yes |
| 815-449 | Frontier | DAKOTA | – | yes | yes |
| 815-450 | AT&T | MOMENCE | 2004-07-27 | yes | yes |
| 815-451 | AT&T | WOODSTOCK | – | yes | yes |
| 815-452 | Frontier | TOLUCA | – | yes | yes |
| 815-453 | Frontier | ASHTON | – | yes | yes |
| 815-454 | Frontier | SHEFFIELD | – | yes | yes |
| 815-455 | AT&T | CRYSTAL LK | – | – | yes |
| 815-456 | Frontier | FRANKLIGRV | – | yes | yes |
| 815-457 | Frontier | CISSNAPARK | – | yes | yes |
| 815-458 | AT&T | BRAIDWOOD | – | yes | yes |
| 815-459 | AT&T | CRYSTAL LK | – | – | yes |
| 815-460 | FIRST COMMUNICATIONS, LLC | JOLIET | – | – | yes |
| 815-461 | Verizon | LOCKPORT | – | – | yes |
| 815-462 | AT&T | NEW LENOX | – | – | yes |
| 815-463 | AT&T | NEW LENOX | – | yes | yes |
| 815-464 | AT&T | FRANKFORT | – | – | yes |
| 815-465 | AT&T | GRANT PARK | – | yes | yes |
| 815-466 | AT&T | GRANT PARK | – | yes | yes |
| 815-467 | AT&T | MINOOKA | – | – | yes |
| 815-468 | AT&T | MANTENO | – | yes | yes |
| 815-469 | AT&T | FRANKFORT | – | – | yes |
| 815-470 | AT&T | ROCKFORD | – | – | yes |
| 815-471 | Verizon | WATSEKA | – | – | yes |
| 815-472 | AT&T | MOMENCE | – | yes | yes |
| 815-473 | Frontier | WOODLAND | – | yes | yes |
| 815-474 | AT&T | JOLIET | – | – | yes |
| 815-475 | AT&T | PLATTVILLE | – | yes | yes |
| 815-476 | AT&T | WILMINGTON | – | yes | yes |
| 815-477 | AT&T | CRYSTAL LK | – | – | yes |
| 815-478 | AT&T | MANHATTAN | – | yes | yes |
| 815-479 | AT&T | CRYSTAL LK | – | yes | yes |
| 815-480 | Spok | ROCKFORD | 2001-03-22 | – | yes |
| 815-481 | Verizon | LA GRANGE | – | – | yes |
| 815-482 | T-Mobile | WOODSTOCK | – | yes | yes |
| 815-483 | T-Mobile | JOLIET | – | yes | yes |
| 815-484 | AT&T | ROCKFORD | – | yes | yes |
| 815-485 | AT&T | NEW LENOX | – | – | yes |
| 815-486 | Frontier | DONOVAN | – | yes | yes |
| 815-487 | FIRST COMMUNICATIONS, LLC | PLAINFIELD | – | – | yes |
| 815-488 | Verizon | LA GRANGE | – | – | yes |
| 815-489 | AT&T | ROCKFORD | – | yes | yes |
| 815-490 | AT&T | ROCKFORD | – | – | yes |
| 815-491 | NUSO, LLC | ROCKFORD | 2013-03-13 | yes | yes |
| 815-492 | Frontier | APPLERIVER | – | yes | yes |
| 815-493 | Frontier | LANARK | – | yes | yes |
| 815-494 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-495 | Frontier | LELAND | – | yes | yes |
| 815-496 | Frontier | SHERIDAN | – | yes | yes |
| 815-497 | Frontier | COMPTON | – | yes | yes |
| 815-498 | Frontier | SOMONAUK | – | yes | yes |
| 815-499 | UNITED STATES CELLULAR - IL | STERLING | – | yes | yes |
| 815-500 | MCC TELEPHONY LLC | MARSEILLES | – | yes | yes |
| 815-501 | T-Mobile | DE KALB | – | yes | yes |
| 815-502 | FIRST COMMUNICATIONS, LLC | WOODSTOCK | – | – | yes |
| 815-503 | T-Mobile | MENDOTA | – | yes | yes |
| 815-504 | FIRST COMMUNICATIONS, LLC | GARDNER | – | – | yes |
| 815-505 | T-Mobile | ROCKFORD | – | – | yes |
| 815-506 | Lumen | UNION | 2002-02-27 | yes | yes |
| 815-507 | Lumen | MOMENCE | 2001-12-28 | yes | yes |
| 815-508 | AT&T | DE KALB | 2004-06-16 | yes | yes |
| 815-509 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-510 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | STREATOR | 2010-01-08 | yes | yes |
| 815-512 | FIRST COMMUNICATIONS, LLC | LOCKPORT | – | – | yes |
| 815-513 | Lumen | MORRIS | 2002-02-27 | yes | yes |
| 815-514 | T-Mobile | JOLIET | 2001-01-24 | yes | yes |
| 815-515 | Lumen | WATSEKA | 2002-02-04 | yes | yes |
| 815-516 | T-Mobile | ROCKFORD | 2001-01-24 | yes | yes |
| 815-517 | Verizon | DE KALB | 2004-06-28 | yes | yes |
| 815-518 | FIRST COMMUNICATIONS, LLC | COAL CITY | 2001-10-23 | yes | yes |
| 815-519 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-520 | Verizon | ROCKFORD | – | – | yes |
| 815-521 | AT&T | MINOOKA | – | yes | yes |
| 815-522 | Frontier | KIRKLAND | – | yes | yes |
| 815-523 | AT&T | KANKAKEE | – | yes | yes |
| 815-524 | AT&T | LOCKPORT | – | yes | yes |
| 815-525 | TDS | SO BELOIT | – | – | yes |
| 815-526 | AT&T | CRYSTAL LK | – | yes | yes |
| 815-527 | AT&T | WOODSTOCK | – | yes | yes |
| 815-528 | AT&T | MCHENRY | – | yes | yes |
| 815-529 | Verizon | WOODSTOCK | – | – | yes |
| 815-530 | T-Mobile | JOLIET | – | yes | yes |
| 815-531 | AT&T | JOLIET | – | yes | yes |
| 815-532 | Spok | MORRIS | – | – | yes |
| 815-533 | INDIANA PAGING NETWORK, INC. | LA GRANGE | – | – | yes |
| 815-534 | Lumen | FRANKFORT | – | yes | yes |
| 815-535 | AT&T | STERLING | – | yes | yes |
| 815-536 | Spok | LA GRANGE | – | – | yes |
| 815-537 | Frontier | PROPHETSTN | – | – | yes |
| 815-538 | Frontier | MENDOTA | – | yes | yes |
| 815-539 | Frontier | MENDOTA | – | yes | yes |
| 815-540 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-541 | UNITED STATES CELLULAR - IL | FREEPORT | – | yes | yes |
| 815-542 | Frontier | THOMAS | – | yes | yes |
| 815-543 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-544 | Frontier | BELVIDERE | – | – | yes |
| 815-545 | AT&T | JOLIET | – | – | yes |
| 815-546 | AT&T | JOLIET | – | – | yes |
| 815-547 | Frontier | BELVIDERE | – | – | yes |
| 815-548 | AT&T | STERLING | – | – | yes |
| 815-549 | T-Mobile | KANKAKEE | – | yes | yes |
| 815-550 | Lumen | GRANT PARK | – | yes | yes |
| 815-551 | Onvoy | LANARK | 2018-08-01 | yes | yes |
| 815-552 | AT&T | LOCKPORT | 2001-04-10 | yes | yes |
| 815-553 | Windstream | JOLIET | 2001-04-10 | yes | yes |
| 815-554 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | E DUBUQUE | – | yes | yes |
| 815-556 | Lumen | PLAINFIELD | 2001-04-10 | yes | yes |
| 815-557 | T-Mobile | JOLIET | – | yes | yes |
| 815-558 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-559 | VoIP Innovations | CHENOA | – | yes | yes |
| 815-560 | T-Mobile | HARVARD | 2002-05-03 | yes | yes |
| 815-561 | Frontier | ROCHELLE | – | yes | yes |
| 815-562 | Frontier | ROCHELLE | – | – | yes |
| 815-563 | Frontier | CEDARVILLE | – | yes | yes |
| 815-564 | AT&T | STERLING | – | yes | yes |
| 815-565 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | SAVANNA | – | yes | yes |
| 815-566 | Lumen | BELVIDERE | 2002-06-21 | yes | yes |
| 815-567 | Frontier | CAMPUS | – | yes | yes |
| 815-568 | AT&T | MARENGO | – | yes | yes |
| 815-569 | Frontier | CAPRON | – | yes | yes |
| 815-570 | Lumen | SANDWICH | 2002-08-21 | yes | yes |
| 815-571 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | SHANNON | 2006-04-21 | yes | yes |
| 815-572 | Lumen | MARENGO | – | yes | yes |
| 815-573 | Lumen | KANKAKEE | 2002-02-27 | yes | yes |
| 815-574 | AERO NORTH COMMUNICATIONS, INC. - IL | HARMON | – | – | yes |
| 815-575 | AT&T | WOODSTOCK | – | yes | yes |
| 815-576 | AERO NORTH COMMUNICATIONS, INC. - IL | POLO | – | yes | yes |
| 815-577 | AT&T | PLAINFIELD | – | – | yes |
| 815-578 | AT&T | MCHENRY | – | – | yes |
| 815-579 | T-Mobile | LA SALLE | – | yes | yes |
| 815-580 | AT&T | CHERRY VLY | 2003-03-18 | yes | yes |
| 815-581 | Comcast | SPRING GRV | 2005-10-06 | yes | yes |
| 815-582 | T-Mobile | JOLIET | 2005-10-06 | yes | yes |
| 815-583 | AERO NORTH COMMUNICATIONS, INC. - IL | MORRISON | – | – | yes |
| 815-584 | AT&T | DWIGHT | – | yes | yes |
| 815-585 | Lumen | MORRIS | 2002-05-03 | yes | yes |
| 815-586 | C-R TELEPHONE CO. | RANSOM | – | – | yes |
| 815-587 | Lumen | OTTAWA | 2002-04-02 | yes | yes |
| 815-588 | AT&T | LOCKPORT | – | yes | yes |
| 815-589 | Frontier | FULTON | – | – | yes |
| 815-590 | T-Mobile | STERLING | 2003-07-14 | yes | yes |
| 815-591 | Frontier | HANOVER | – | yes | yes |
| 815-592 | Verizon | KANKAKEE | – | – | yes |
| 815-593 | T-Mobile | DE KALB | – | yes | yes |
| 815-594 | Frontier | APPLERIVER | – | yes | yes |
| 815-595 | AT&T | OREGON | 2003-10-02 | yes | yes |
| 815-596 | AT&T | MARENGO | 2006-02-10 | yes | yes |
| 815-597 | Frontier | GARDENPRRI | – | yes | yes |
| 815-598 | Frontier | MASSBACH | – | yes | yes |
| 815-599 | Frontier | FREEPORT | – | yes | yes |
| 815-600 | AT&T | JOLIET | 2003-07-14 | yes | yes |
| 815-601 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-602 | FIRST COMMUNICATIONS, LLC | KANKAKEE | – | – | yes |
| 815-603 | T-Mobile | JOLIET | 2001-09-28 | – | yes |
| 815-604 | Onvoy | BELVIDERE | 2019-07-31 | yes | yes |
| 815-605 | Lumen | GRANT PARK | 2002-04-02 | yes | yes |
| 815-606 | FIRST COMMUNICATIONS, LLC | OTTAWA | – | – | yes |
| 815-607 | Charter | PEARL CITY | 2024-10-01 | yes | yes |
| 815-608 | T-Mobile | ROCKFORD | 2002-09-30 | yes | yes |
| 815-609 | AT&T | PLAINFIELD | 2001-10-24 | – | yes |
| 815-610 | Onvoy | HENNEPIN | 2024-10-30 | yes | yes |
| 815-612 | AT&T | MOMENCE | 2025-05-16 | yes | yes |
| 815-613 | AT&T | DIXON | 2019-08-30 | yes | yes |
| 815-614 | AT&T | KANKAKEE | – | yes | yes |
| 815-615 | Lumen | MENDOTA | 2001-10-31 | yes | yes |
| 815-616 | T-Mobile | FREEPORT | 2004-01-07 | yes | yes |
| 815-617 | AT&T | OTTAWA | – | yes | yes |
| 815-618 | AT&T | FREEPORT | 2006-12-21 | yes | yes |
| 815-619 | AERO NORTH COMMUNICATIONS, INC. - IL | ROCKTON | 2003-05-27 | – | yes |
| 815-620 | Peerless | MINOOKA | 2018-10-31 | yes | yes |
| 815-621 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-622 | AT&T | STERLING | – | yes | yes |
| 815-623 | Frontier | ROSCOE | – | yes | yes |
| 815-624 | Frontier | ROCKTON | – | yes | yes |
| 815-625 | AT&T | STERLING | – | – | yes |
| 815-626 | AT&T | STERLING | – | – | yes |
| 815-627 | Frontier | PAW PAW | – | yes | yes |
| 815-628 | Frontier | W BROOKLYN | – | yes | yes |
| 815-629 | Frontier | SHIRLAND | – | yes | yes |
| 815-630 | T-Mobile | JOLIET | 2006-07-24 | yes | yes |
| 815-631 | AT&T | STERLING | – | yes | yes |
| 815-632 | AT&T | STERLING | – | yes | yes |
| 815-633 | AT&T | ROCKFORD | – | – | yes |
| 815-634 | AT&T | COAL CITY | – | yes | yes |
| 815-635 | Frontier | CHATSWORTH | – | yes | yes |
| 815-636 | AT&T | ROCKFORD | – | – | yes |
| 815-637 | AT&T | ROCKFORD | – | – | yes |
| 815-638 | Frontier | LA MOILLE | – | yes | yes |
| 815-639 | AT&T | ROCKFORD | – | – | yes |
| 815-640 | AT&T | OTTAWA | 2001-12-28 | yes | yes |
| 815-641 | Verizon | JOLIET | 2008-01-21 | yes | yes |
| 815-642 | Lumen | MINOOKA | – | yes | yes |
| 815-643 | Frontier | DOVER | – | yes | yes |
| 815-644 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CRESCENTCY | – | yes | yes |
| 815-645 | Frontier | STILMANVLY | – | yes | yes |
| 815-646 | Frontier | TISKILWA | – | yes | yes |
| 815-647 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | CULLOM | – | yes | yes |
| 815-648 | Frontier | HEBRON | – | yes | yes |
| 815-649 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | GARDNER | – | yes | yes |
| 815-650 | T-Mobile | FREEPORT | – | yes | yes |
| 815-651 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | JOLIET | – | yes | yes |
| 815-652 | Brightspeed | GRANDDTOUR | – | yes | yes |
| 815-653 | Frontier | WONDERLAKE | – | yes | yes |
| 815-654 | AT&T | ROCKFORD | – | – | yes |
| 815-655 | AT&T | COAL CITY | 2019-02-18 | yes | yes |
| 815-656 | Lumen | FREEPORT | 2002-06-26 | yes | yes |
| 815-657 | AT&T | FORREST | – | yes | yes |
| 815-658 | AT&T | NEWARK | 2019-08-02 | yes | yes |
| 815-659 | Frontier | BUREAU | – | yes | yes |
| 815-660 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | LOCKPORT | – | yes | yes |
| 815-661 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | MORRIS | – | yes | yes |
| 815-662 | Lumen | MOMENCE | – | yes | yes |
| 815-663 | Frontier | SPRING VLY | – | yes | yes |
| 815-664 | Frontier | SPRING VLY | – | yes | yes |
| 815-665 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | OTTAWA | – | yes | yes |
| 815-666 | Verizon | JOLIET | 2006-08-30 | yes | yes |
| 815-667 | AT&T | UTICA | – | yes | yes |
| 815-668 | Onvoy | ROCKFORD | 2009-04-02 | yes | yes |
| 815-669 | Lumen | MCHENRY | – | yes | yes |
| 815-670 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-671 | Lumen | JOLIET | – | yes | yes |
| 815-672 | Frontier | STREATOR | – | – | yes |
| 815-673 | Frontier | STREATOR | – | yes | yes |
| 815-674 | AT&T | STREATOR | – | – | yes |
| 815-675 | Frontier | SPRING GRV | – | yes | yes |
| 815-676 | Lumen | PLAINFIELD | – | yes | yes |
| 815-677 | Verizon | DIXON | 2005-03-17 | yes | yes |
| 815-678 | Frontier | RICHMOND | – | yes | yes |
| 815-679 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | MCHENRY | – | yes | yes |
| 815-680 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | MANHATTAN | – | yes | yes |
| 815-681 | Verizon | OGLESBY | 2010-07-30 | yes | yes |
| 815-682 | Frontier | STOCKLAND | – | yes | yes |
| 815-683 | AT&T | CRESCENTCY | – | yes | yes |
| 815-684 | Frontier | CHADWICK | – | – | yes |
| 815-685 | AT&T | JOLIET | – | – | yes |
| 815-686 | Frontier | PIPER CITY | – | yes | yes |
| 815-687 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | WOODSTOCK | – | yes | yes |
| 815-688 | Frontier | STRAWN | – | yes | yes |
| 815-689 | Frontier | CULLOM | – | – | yes |
| 815-690 | T-Mobile | JOLIET | – | yes | yes |
| 815-691 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | UTICA | – | yes | yes |
| 815-692 | Frontier | FAIRBURY | – | yes | yes |
| 815-693 | T-Mobile | JOLIET | – | yes | yes |
| 815-694 | Frontier | CLIFTON | – | yes | yes |
| 815-695 | AT&T | NEWARK | – | yes | yes |
| 815-696 | AERO NORTH COMMUNICATIONS, INC. - IL | ROSCOE | 2003-05-27 | – | yes |
| 815-697 | Frontier | CHEBANSE | – | yes | yes |
| 815-698 | Frontier | ASHKUM | – | yes | yes |
| 815-699 | Frontier | WYANET | – | yes | yes |
| 815-701 | Lumen | WOODSTOCK | 2002-04-02 | yes | yes |
| 815-702 | Lumen | SAUNEMIN | – | yes | yes |
| 815-703 | T-Mobile | ROCKFORD | 2002-06-04 | yes | yes |
| 815-704 | Windstream | SO BELOIT | 2001-02-23 | yes | yes |
| 815-705 | AT&T | MORRIS | 2001-12-28 | yes | yes |
| 815-706 | EXIANT COMMUNICATIONS LLC | ROCKFORD | 2019-09-03 | yes | yes |
| 815-707 | Lumen | GILMAN | 2001-12-06 | yes | yes |
| 815-708 | Comcast | ROCKFORD | 2006-06-23 | yes | yes |
| 815-709 | Lumen | COAL CITY | 2001-12-28 | yes | yes |
| 815-710 | AT&T | MORRIS | 2001-01-24 | yes | yes |
| 815-712 | T-Mobile | LA SALLE | 2002-07-05 | yes | yes |
| 815-713 | AT&T | ROCKFORD | 2001-09-28 | yes | yes |
| 815-714 | Bandwidth | JOLIET | – | yes | yes |
| 815-715 | AT&T | JOLIET | 2001-05-22 | – | yes |
| 815-716 | T-Mobile | STERLING | 2001-10-31 | yes | yes |
| 815-717 | FIRST COMMUNICATIONS, LLC | NEW LENOX | – | yes | yes |
| 815-718 | UNITED STATES CELLULAR - IL | STERLING | 2002-10-22 | yes | yes |
| 815-719 | T-Mobile | PRINCETON | 2002-07-05 | yes | yes |
| 815-720 | AT&T | ROCKFORD | – | – | yes |
| 815-721 | AT&T | ROCKFORD | – | yes | yes |
| 815-722 | AT&T | JOLIET | – | – | yes |
| 815-723 | AT&T | JOLIET | – | – | yes |
| 815-724 | AT&T | JOLIET | – | – | yes |
| 815-725 | AT&T | JOLIET | – | – | yes |
| 815-726 | AT&T | JOLIET | – | – | yes |
| 815-727 | AT&T | JOLIET | – | – | yes |
| 815-728 | Frontier | WONDERLAKE | – | yes | yes |
| 815-729 | AT&T | JOLIET | – | – | yes |
| 815-730 | AT&T | JOLIET | – | – | yes |
| 815-731 | AT&T | PLAINFIELD | 2006-02-16 | yes | yes |
| 815-732 | Frontier | OREGON | – | yes | yes |
| 815-733 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | PLAINFIELD | – | yes | yes |
| 815-734 | Frontier | MT MORRIS | – | yes | yes |
| 815-735 | AT&T | JOLIET | – | – | yes |
| 815-736 | AT&T | LISBON | – | yes | yes |
| 815-737 | SHARON TEL. CO. - IL | SO SHARON | – | – | yes |
| 815-738 | LEAF RIVER TELEPHONE CO. | LEAF RIVER | – | – | yes |
| 815-739 | T-Mobile | SYCAMORE | – | yes | yes |
| 815-740 | AT&T | JOLIET | – | – | yes |
| 815-741 | AT&T | JOLIET | – | – | yes |
| 815-742 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-743 | Frontier | GRAYMONT | – | yes | yes |
| 815-744 | AT&T | JOLIET | – | – | yes |
| 815-745 | Frontier | WARREN | – | yes | yes |
| 815-746 | MARSEILLES TEL. CO. OF MARSEILLES | MARSEILLES | 2008-05-13 | – | yes |
| 815-747 | Frontier | E DUBUQUE | – | – | yes |
| 815-748 | Frontier | DE KALB | – | – | yes |
| 815-749 | Bandwidth | LOCKPORT | 2022-08-19 | yes | yes |
| 815-750 | MTCO COMMUNICATIONS, INC. | MARSEILLES | 2003-01-23 | – | yes |
| 815-751 | Verizon | DE KALB | – | – | yes |
| 815-752 | Frontier | DE KALB | – | – | yes |
| 815-753 | Frontier | DE KALB | – | – | yes |
| 815-754 | Frontier | DE KALB | – | – | yes |
| 815-755 | Onvoy | SENECA | 2016-01-08 | yes | yes |
| 815-756 | Frontier | DE KALB | – | yes | yes |
| 815-757 | UNITED STATES CELLULAR - IL | DE KALB | – | yes | yes |
| 815-758 | Frontier | DE KALB | – | – | yes |
| 815-759 | AT&T | MCHENRY | – | – | yes |
| 815-760 | Verizon | BUREAU | 2005-10-25 | yes | yes |
| 815-761 | Verizon | DE KALB | – | – | yes |
| 815-762 | Verizon | DE KALB | – | – | yes |
| 815-763 | Verizon | JOLIET | 2022-10-11 | yes | yes |
| 815-764 | UNITED STATES CELLULAR - IL | DE KALB | – | yes | yes |
| 815-765 | Frontier | POPLAR GRV | – | yes | yes |
| 815-766 | UNITED STATES CELLULAR - IL | DE KALB | – | yes | yes |
| 815-767 | American Messaging | LA GRANGE | 2001-04-16 | – | yes |
| 815-768 | AT&T | JOLIET | – | yes | yes |
| 815-769 | Lumen | SENECA | 2001-04-27 | yes | yes |
| 815-770 | Charter | HARVARD | 2006-02-13 | yes | yes |
| 815-771 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | ASHKUM | – | yes | yes |
| 815-772 | Frontier | MORRISON | – | – | yes |
| 815-773 | AT&T | JOLIET | – | – | yes |
| 815-774 | AT&T | JOLIET | – | – | yes |
| 815-775 | Spok | WOODSTOCK | – | – | yes |
| 815-776 | AT&T | GALENA | – | yes | yes |
| 815-777 | AT&T | GALENA | – | – | yes |
| 815-778 | Frontier | LYNDON | – | – | yes |
| 815-779 | T-Mobile | PLAINFIELD | 2024-02-08 | yes | yes |
| 815-780 | Lumen | LA SALLE | 2001-08-22 | yes | yes |
| 815-781 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | CHEBANSE | – | yes | yes |
| 815-782 | Lumen | PLAINFIELD | – | yes | yes |
| 815-783 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | GILMAN | – | yes | yes |
| 815-784 | Frontier | GENOA | – | yes | yes |
| 815-785 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | WATSEKA | – | yes | yes |
| 815-786 | Frontier | SANDWICH | – | yes | yes |
| 815-787 | Frontier | DE KALB | – | – | yes |
| 815-788 | AT&T | CRYSTAL LK | 2001-03-22 | yes | yes |
| 815-789 | Frontier | ORANGEVL | – | yes | yes |
| 815-790 | T-Mobile | WOODSTOCK | – | yes | yes |
| 815-791 | T-Mobile | JOLIET | 2001-07-24 | yes | yes |
| 815-792 | AT&T | HARDING | – | yes | yes |
| 815-793 | T-Mobile | DE KALB | 2001-06-25 | yes | yes |
| 815-794 | MARSEILLES TEL. CO. OF MARSEILLES | MARSEILLES | – | yes | yes |
| 815-795 | MARSEILLES TEL. CO. OF MARSEILLES | MARSEILLES | – | yes | yes |
| 815-796 | Frontier | FLANAGAN | – | yes | yes |
| 815-797 | Lumen | SOMONAUK | 2001-12-06 | yes | yes |
| 815-798 | AERO NORTH COMMUNICATIONS, INC. - IL | MILLEDGEVL | – | – | yes |
| 815-799 | Lumen | MANLIUS | 2001-08-22 | yes | yes |
| 815-800 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | POPLAR GRV | 2010-03-24 | yes | yes |
| 815-801 | AERO NORTH COMMUNICATIONS, INC. - IL | FREEPORT | – | – | yes |
| 815-802 | AT&T | KANKAKEE | 2001-09-28 | yes | yes |
| 815-803 | AERO NORTH COMMUNICATIONS, INC. - IL | BYRON | 2001-03-22 | – | yes |
| 815-804 | AERO NORTH COMMUNICATIONS, INC. - IL | PECATONICA | – | – | yes |
| 815-805 | AERO NORTH COMMUNICATIONS, INC. - IL | DURAND | – | – | yes |
| 815-806 | AT&T | FRANKFORT | – | yes | yes |
| 815-807 | AERO NORTH COMMUNICATIONS, INC. - IL | GERMAN VLY | – | – | yes |
| 815-808 | AERO NORTH COMMUNICATIONS, INC. - IL | WINSLOW | – | – | yes |
| 815-809 | AERO NORTH COMMUNICATIONS, INC. - IL | LENA | – | – | yes |
| 815-810 | AERO NORTH COMMUNICATIONS, INC. - IL | PEARL CITY | – | – | yes |
| 815-812 | AERO NORTH COMMUNICATIONS, INC. - IL | DAKOTA | – | – | yes |
| 815-813 | AERO NORTH COMMUNICATIONS, INC. - IL | APPLERIVER | – | – | yes |
| 815-814 | T-Mobile | WOODSTOCK | 2001-04-27 | – | yes |
| 815-815 | Charter | LADD | 2024-09-30 | yes | yes |
| 815-816 | AERO NORTH COMMUNICATIONS, INC. - IL | CEDARVILLE | – | – | yes |
| 815-817 | AERO NORTH COMMUNICATIONS, INC. - IL | HANOVER | – | – | yes |
| 815-818 | AERO NORTH COMMUNICATIONS, INC. - IL | WARREN | – | – | yes |
| 815-819 | AERO NORTH COMMUNICATIONS, INC. - IL | ORANGEVL | – | – | yes |
| 815-820 | AERO NORTH COMMUNICATIONS, INC. - IL | ELIZABETH | – | – | yes |
| 815-821 | UNITED STATES CELLULAR - IL | FREEPORT | 2001-05-22 | yes | yes |
| 815-822 | AT&T | STREATOR | 2001-04-27 | yes | yes |
| 815-823 | T-Mobile | JOLIET | – | yes | yes |
| 815-824 | Frontier | SHABBONA | – | yes | yes |
| 815-825 | Frontier | MALTA | – | yes | yes |
| 815-826 | Verizon | SOMONAUK | 2004-05-12 | yes | yes |
| 815-827 | Frontier | MAPLE PARK | – | yes | yes |
| 815-828 | Verizon | MINOOKA | 2001-08-22 | yes | yes |
| 815-829 | AERO NORTH COMMUNICATIONS, INC. - IL | CHADWICK | – | – | yes |
| 815-830 | AT&T | OGLESBY | – | – | yes |
| 815-831 | AERO NORTH COMMUNICATIONS, INC. - IL | DAVIS | – | – | yes |
| 815-832 | Frontier | SAUNEMIN | – | – | yes |
| 815-833 | AERO NORTH COMMUNICATIONS, INC. - IL | MCCONNELL | – | – | yes |
| 815-834 | AT&T | LOCKPORT | – | yes | yes |
| 815-835 | AERO NORTH COMMUNICATIONS, INC. - IL | DIXON | – | – | yes |
| 815-836 | AT&T | LOCKPORT | – | yes | yes |
| 815-837 | AERO NORTH COMMUNICATIONS, INC. - IL | FORRESTON | – | – | yes |
| 815-838 | AT&T | LOCKPORT | – | – | yes |
| 815-839 | Verizon | KANKAKEE | – | yes | yes |
| 815-840 | AERO NORTH COMMUNICATIONS, INC. - IL | STOCKTON | – | – | yes |
| 815-841 | AERO NORTH COMMUNICATIONS, INC. - IL | MT MORRIS | – | – | yes |
| 815-842 | Frontier | PONTIAC | – | yes | yes |
| 815-843 | AERO NORTH COMMUNICATIONS, INC. - IL | ASHTON | – | – | yes |
| 815-844 | Frontier | PONTIAC | – | yes | yes |
| 815-845 | Frontier | SCALESMOND | – | yes | yes |
| 815-846 | Lumen | JOLIET | – | – | yes |
| 815-847 | AT&T | ROCKFORD | 2005-04-18 | yes | yes |
| 815-848 | Verizon | PONTIAC | – | – | yes |
| 815-849 | Frontier | SUBLETTE | – | yes | yes |
| 815-850 | AERO NORTH COMMUNICATIONS, INC. - IL | SEWARD | – | – | yes |
| 815-851 | Spok | KANKAKEE | – | – | yes |
| 815-852 | AERO NORTH COMMUNICATIONS, INC. - IL | SCALESMOND | – | – | yes |
| 815-853 | Frontier | WENONA | – | yes | yes |
| 815-854 | Frontier | LONG POINT | – | yes | yes |
| 815-855 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | MILLEDGEVL | 2002-04-02 | yes | yes |
| 815-856 | LEONORE MUTUAL TEL. CO. | LEONORE | – | – | yes |
| 815-857 | Frontier | AMBOY | – | yes | yes |
| 815-858 | Frontier | ELIZABETH | – | yes | yes |
| 815-859 | Vonage | ROCHELLE | 2019-09-30 | yes | yes |
| 815-860 | AT&T | ELWOOD | 2010-03-05 | yes | yes |
| 815-861 | AT&T | WOODSTOCK | – | – | yes |
| 815-862 | Charter | RICHMOND | 2008-11-18 | yes | yes |
| 815-863 | Frontier | RUTLAND | – | yes | yes |
| 815-864 | Frontier | SHANNON | – | yes | yes |
| 815-865 | Frontier | DAVIS | – | yes | yes |
| 815-866 | Verizon | PRINCETON | – | – | yes |
| 815-867 | T-Mobile | PONTIAC | 2001-04-27 | yes | yes |
| 815-868 | Frontier | MCCONNELL | – | yes | yes |
| 815-869 | Frontier | MAGNOLIA | – | yes | yes |
| 815-870 | Spok | ROCKFORD | – | – | yes |
| 815-871 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-872 | Frontier | PRINCETON | – | – | yes |
| 815-873 | Frontier | NEWMILFORD | – | yes | yes |
| 815-874 | Frontier | NEWMILFORD | – | – | yes |
| 815-875 | Frontier | PRINCETON | – | yes | yes |
| 815-876 | Frontier | PRINCETON | – | yes | yes |
| 815-877 | AT&T | ROCKFORD | – | – | yes |
| 815-878 | AT&T | PRINCETON | – | – | yes |
| 815-879 | Frontier | PRINCETON | – | yes | yes |
| 815-880 | Verizon | WOODSTOCK | 2001-01-24 | yes | yes |
| 815-881 | Lumen | OREGON | – | yes | yes |
| 815-882 | MCNABB TEL. CO. | MCNABB | – | – | yes |
| 815-883 | AT&T | OGLESBY | – | yes | yes |
| 815-884 | MCC TELEPHONY LLC | EARLVILLE | 2010-03-23 | yes | yes |
| 815-885 | Frontier | ROCK CUT | – | yes | yes |
| 815-886 | AT&T | LOCKPORT | – | – | yes |
| 815-887 | AT&T | HARVARD | 2002-05-03 | yes | yes |
| 815-888 | Lumen | ROCHELLE | 2006-11-27 | yes | yes |
| 815-889 | Frontier | MILFORD | – | yes | yes |
| 815-890 | AERO NORTH COMMUNICATIONS, INC. - IL | NEWMILFORD | 2003-05-27 | – | yes |
| 815-891 | AERO NORTH COMMUNICATIONS, INC. - IL | WINNEBAGO | 2001-06-25 | – | yes |
| 815-892 | AT&T | STILMANVLY | 2019-11-21 | yes | yes |
| 815-893 | Comcast | CRYSTAL LK | 2004-12-30 | yes | yes |
| 815-894 | Frontier | LADD | – | yes | yes |
| 815-895 | Frontier | SYCAMORE | – | – | yes |
| 815-896 | AERO NORTH COMMUNICATIONS, INC. - IL | SHIRLAND | 2001-07-24 | – | yes |
| 815-897 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | LYNDON | – | yes | yes |
| 815-898 | AERO NORTH COMMUNICATIONS, INC. - IL | MASSBACH | 2001-02-23 | – | yes |
| 815-899 | Frontier | SYCAMORE | – | – | yes |
| 815-900 | AT&T | MCHENRY | 2010-08-04 | yes | yes |
| 815-901 | Comcast | DE KALB | 2005-02-14 | yes | yes |
| 815-902 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | THOMSON | 2001-06-25 | yes | yes |
| 815-903 | American Messaging | MCHENRY | 2002-02-27 | – | yes |
| 815-904 | AT&T | ROCKFORD | 2006-08-31 | yes | yes |
| 815-905 | Lumen | LOCKPORT | 2002-02-27 | yes | yes |
| 815-906 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | MT CARROLL | 2006-04-21 | yes | yes |
| 815-907 | Lumen | MANTENO | 2001-12-06 | yes | yes |
| 815-908 | Verizon | FREEPORT | – | yes | yes |
| 815-909 | T-Mobile | DE KALB | 2001-05-22 | yes | yes |
| 815-910 | Verizon | MENDOTA | – | – | yes |
| 815-912 | AERO NORTH COMMUNICATIONS, INC. - IL | BELVIDERE | 2001-09-28 | yes | yes |
| 815-913 | Lumen | CHADWICK | – | yes | yes |
| 815-914 | T-Mobile | ROCKFORD | – | yes | yes |
| 815-915 | Lumen | PRINCETON | 2001-12-28 | yes | yes |
| 815-916 | Onvoy | PLATTVILLE | – | yes | yes |
| 815-917 | AERO NORTH COMMUNICATIONS, INC. - IL | ROCHELLE | – | – | yes |
| 815-918 | Lumen | CLIFTON | 2001-08-22 | yes | yes |
| 815-919 | T-Mobile | JOLIET | 2001-02-23 | – | yes |
| 815-920 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | CORNELL | 2005-11-22 | yes | yes |
| 815-921 | AT&T | ROCKFORD | 2001-04-27 | yes | yes |
| 815-922 | Verizon | KANKAKEE | – | – | yes |
| 815-923 | AT&T | UNION | – | yes | yes |
| 815-924 | AERO NORTH COMMUNICATIONS, INC. - IL | PROPHETSTN | – | – | yes |
| 815-925 | Frontier | HENNEPIN | – | yes | yes |
| 815-926 | Lumen | WILMINGTON | 2001-05-22 | yes | yes |
| 815-927 | Lumen | JOLIET | – | yes | yes |
| 815-928 | AT&T | KANKAKEE | – | – | yes |
| 815-929 | AT&T | KANKAKEE | – | – | yes |
| 815-930 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | ELIZABETH | 2002-06-04 | yes | yes |
| 815-931 | AT&T | JOLIET | – | yes | yes |
| 815-932 | AT&T | KANKAKEE | – | – | yes |
| 815-933 | AT&T | KANKAKEE | – | – | yes |
| 815-934 | Frontier | EMINGTON | – | yes | yes |
| 815-935 | AT&T | KANKAKEE | – | – | yes |
| 815-936 | AT&T | KANKAKEE | – | – | yes |
| 815-937 | AT&T | KANKAKEE | – | – | yes |
| 815-938 | Frontier | FORRESTON | – | yes | yes |
| 815-939 | AT&T | KANKAKEE | – | – | yes |
| 815-940 | Lumen | GARDNER | 2002-05-03 | yes | yes |
| 815-941 | AT&T | MORRIS | – | – | yes |
| 815-942 | AT&T | MORRIS | – | – | yes |
| 815-943 | AT&T | HARVARD | – | – | yes |
| 815-944 | AT&T | MOMENCE | – | yes | yes |
| 815-945 | Frontier | CHENOA | – | yes | yes |
| 815-946 | Frontier | POLO | – | yes | yes |
| 815-947 | Frontier | STOCKTON | – | yes | yes |
| 815-948 | Frontier | HOOPPOLE | – | yes | yes |
| 815-949 | Frontier | CABERY | – | yes | yes |
| 815-951 | AERO NORTH COMMUNICATIONS, INC. - IL | AMBOY | – | yes | yes |
| 815-952 | AERO NORTH COMMUNICATIONS, INC. - IL | LANARK | 2006-07-18 | – | yes |
| 815-953 | Verizon | KANKAKEE | – | – | yes |
| 815-954 | Verizon | KANKAKEE | – | – | yes |
| 815-955 | T-Mobile | JOLIET | 2002-07-05 | yes | yes |
| 815-956 | Frontier | MORRISON | – | yes | yes |
| 815-957 | Lumen | ROCKTON | 2005-02-22 | yes | yes |
| 815-960 | NORTH COUNTY COMMUNICATION CORPORATION - CA | LEAF RIVER | 2002-06-04 | – | yes |
| 815-961 | AT&T | ROCKFORD | – | – | yes |
| 815-962 | AT&T | ROCKFORD | – | – | yes |
| 815-963 | AT&T | ROCKFORD | – | – | yes |
| 815-964 | AT&T | ROCKFORD | – | – | yes |
| 815-965 | AT&T | ROCKFORD | – | – | yes |
| 815-966 | AT&T | ROCKFORD | – | – | yes |
| 815-967 | AT&T | ROCKFORD | – | – | yes |
| 815-968 | AT&T | ROCKFORD | – | – | yes |
| 815-969 | AT&T | ROCKFORD | – | yes | yes |
| 815-970 | T-Mobile | SYCAMORE | 2002-07-05 | yes | yes |
| 815-971 | AT&T | ROCKFORD | – | – | yes |
| 815-972 | AT&T | ROCKFORD | – | – | yes |
| 815-973 | UNITED STATES CELLULAR - IL | DIXON | – | yes | yes |
| 815-974 | Onvoy | HEBRON | 2018-07-03 | yes | yes |
| 815-975 | AT&T | BELVIDERE | 2002-09-03 | yes | yes |
| 815-977 | Verizon | ROCKFORD | 2003-06-25 | yes | yes |
| 815-978 | Verizon | ROCKFORD | – | – | yes |
| 815-979 | Verizon | ROCKFORD | – | – | yes |
| 815-980 | Verizon | ROCKFORD | 2006-06-15 | yes | yes |
| 815-981 | Lumen | DE KALB | 2002-09-30 | yes | yes |
| 815-982 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | TAMPICO | – | yes | yes |
| 815-983 | American Messaging | ROCKFORD | – | – | yes |
| 815-984 | Frontier | WELLINGTON | – | yes | yes |
| 815-985 | Verizon | ROCKFORD | – | – | yes |
| 815-986 | Windstream | ROCKFORD | – | – | yes |
| 815-987 | AT&T | ROCKFORD | – | – | yes |
| 815-988 | UNITED STATES CELLULAR - IL | ROCKFORD | – | yes | yes |
| 815-989 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | PROPHETSTN | 2005-01-04 | yes | yes |
| 815-990 | Verizon | FREEPORT | 2002-10-22 | yes | yes |
| 815-991 | AT&T | SYCAMORE | – | yes | yes |
| 815-992 | T-Mobile | STREATOR | 2005-04-21 | yes | yes |
| 815-993 | AT&T | OGLESBY | 2006-09-22 | yes | yes |
| 815-994 | T-Mobile | DIXON | 2003-04-14 | yes | yes |
| 815-995 | AT&T | DE KALB | 2009-06-10 | yes | yes |
| 815-996 | Lumen | SAVANNA | – | yes | yes |
| 815-997 | Windstream | ROCKFORD | 2003-03-26 | yes | yes |
| 815-998 | Frontier | ODELL | – | yes | yes |
| 815-999 | T-Mobile | JOLIET | 2003-07-14 | yes | yes |
Frequently asked
How many prefixes does area code 815 have?
786 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 7,860 thousand-number ranges across 200 rate centers.
What do the first three digits after 815 tell me?
They identify the block, which tells you the rate center it was allocated to and the carrier that received it. They do not tell you who serves the number today: portability moves numbers between carriers, and pooling splits a block between several of them.
Is a 815 prefix tied to a specific town?
To a rate center, which is billing geography rather than a town. NANPA abbreviates rate center names to ten characters and in large metros uses zone codes, so the name is a NANPA label, not a place name.
What does “pooled” mean in the 815 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 519 of 815's blocks are pooled, which is how regulators slowed down area code exhaustion – and why one prefix can belong to several carriers.
Source and limits
NANPA CO Code Assignment Records, all states, utilized codes, file updated 11/01/2026 – the rows where the record's Use field is “AS” (assigned). Unavailable codes are excluded. The records say who received a block and when, not who serves a particular number today.
More about this code: overview · carriers · spam complaints · local time