Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 319 prefixes
565 of the 786 possible NXX blocks are assigned in area code 319 (71.9% of capacity), spread across 137 rate centers and 86 holders. The largest holders are QWEST CORPORATION (99 blocks, 17.5%), UNITED STATES CELLULAR - IA (39 blocks, 6.9%), T-MOBILE USA, INC. (39 blocks, 6.9%). Grouped by brand, Lumen accounts for 115 blocks; brand-attributable holders cover 61% 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 2001-01-19 to 2026-03-19, with 26 blocks handed out in 2022 alone. 388 blocks (69%) 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. 76 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
565 assigned blocks of 786
137 rate centers
86 holders of record
69% in thousands-block pooling
Largest holders in 319
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| QWEST CORPORATION | Lumen | 99 | 17.5% |
| UNITED STATES CELLULAR - IA | – | 39 | 6.9% |
| T-MOBILE USA, INC. | T-Mobile | 39 | 6.9% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | Verizon | 39 | 6.9% |
| WINDSTREAM IOWA COMMUNICATIONS, INC. | Windstream | 37 | 6.5% |
| MCC TELEPHONY LLC | – | 33 | 5.8% |
| ONVOY, LLC - IA | Onvoy | 22 | 3.9% |
| WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | Windstream | 21 | 3.7% |
| TON80 COMMUNICATIONS, LLC | – | 17 | 3% |
| PAETEC ITEL, LLC | Windstream | 16 | 2.8% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 15 | 2.7% |
| LEVEL 3 COMMUNICATIONS, LLC - IA | Lumen | 12 | 2.1% |
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.
CEDAR RPDS 110IOWA CITY 50WATERLOO 47BURLINGTON 19CEDARFALLS 13FT MADISON 11MTPLEASANT 10WASHINGTON 10ANAMOSA 9KEOKUK 9OELWEIN 7VINTON 6INDEPNDNCE 6KEOSAUQUA 6WAVERLY 6NO LIBERTY 6COLUMBSJCT 5GRUNDY CTR 5BRIGHTON 5PARKERSBG 5MT VERNON 4CENTER PT 4MONTICELLO 4WILLIAMSBG 4SWISHER 3CENTRAL CY 3ELY 3KALONA 3HUDSON 3BELLEPLAIN 3DENVER 3REINBECK 3FAIRFAX 3COGGON 3WAPELLO 3SOLON 3TIFFIN 3OXFORD 3MARENGO 3
All 565 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 |
|---|---|---|---|---|---|
| 319-200 | IMON COMMUNICATIONS, LLC - IA | CEDAR RPDS | 2012-02-10 | – | yes |
| 319-201 | UNITED STATES CELLULAR - IA | MTPLEASANT | – | yes | yes |
| 319-202 | T-Mobile | CEDAR RPDS | 2004-05-13 | – | yes |
| 319-203 | MCC TELEPHONY LLC | SWISHER | 2010-03-19 | yes | yes |
| 319-204 | FARM & MERCH MUTUAL TELCO DBA KALONA COOP TEL | MTPLEASANT | 2014-08-01 | yes | yes |
| 319-205 | Lumen | MT VERNON | 2017-05-23 | yes | yes |
| 319-206 | Charter | CEDAR RPDS | 2017-08-14 | yes | yes |
| 319-207 | Lumen | MORLEY | 2018-06-28 | yes | yes |
| 319-208 | Windstream | BURLINGTON | 2003-03-25 | yes | yes |
| 319-209 | T-Mobile | BURLINGTON | 2001-04-10 | yes | yes |
| 319-210 | T-Mobile | CEDAR RPDS | 2002-02-12 | yes | yes |
| 319-212 | Verizon | COLUMBSJCT | 2003-04-10 | yes | yes |
| 319-213 | Verizon | CEDAR RPDS | 2004-07-14 | yes | yes |
| 319-214 | MCC TELEPHONY LLC | VINTON | 2004-11-24 | yes | yes |
| 319-215 | UNITED STATES CELLULAR - IA | WATERLOO | 2004-01-19 | yes | yes |
| 319-216 | Lumen | MARTELLE | 2018-06-29 | yes | yes |
| 319-217 | Verizon | MTPLEASANT | 2003-02-06 | yes | yes |
| 319-218 | Lumen | OLIN | 2018-06-29 | yes | yes |
| 319-219 | LOCAL TELEPHONE DATA SERVICES CORP. | MTPLEASANT | – | yes | yes |
| 319-220 | Windstream | CENTRAL CY | 2015-06-25 | yes | yes |
| 319-221 | Lumen | CEDAR RPDS | – | – | yes |
| 319-222 | Lumen | CEDARFALLS | – | yes | yes |
| 319-223 | SOUTH SLOPE COOP. TEL. CO., INC. | NEWHALL | – | – | yes |
| 319-224 | Windstream | TROY MILLS | – | yes | yes |
| 319-225 | MCC TELEPHONY LLC | AMANA | 2006-11-14 | yes | yes |
| 319-226 | Lumen | WATERLOO | – | – | yes |
| 319-227 | SOUTH SLOPE COOP. TEL. CO., INC. | NORWAY | – | – | yes |
| 319-228 | VAN HORNE COOP. TEL. CO. | VAN HORNE | – | – | yes |
| 319-229 | AT&T | WATERLOO | 2014-08-08 | yes | yes |
| 319-230 | Verizon | WATERLOO | – | – | yes |
| 319-231 | UNITED STATES CELLULAR - IA | WATERLOO | – | yes | yes |
| 319-232 | Lumen | WATERLOO | – | – | yes |
| 319-233 | Lumen | WATERLOO | – | – | yes |
| 319-234 | Lumen | WATERLOO | – | – | yes |
| 319-235 | Lumen | WATERLOO | – | – | yes |
| 319-236 | Lumen | WATERLOO | – | – | yes |
| 319-237 | LOCAL TELEPHONE DATA SERVICES CORP. | BURLINGTON | 2002-03-07 | yes | yes |
| 319-238 | Onvoy | OELWEIN | 2004-02-04 | yes | yes |
| 319-239 | UNITED STATES CELLULAR - IA | WATERLOO | – | yes | yes |
| 319-240 | UNITED STATES CELLULAR - IA | WATERLOO | – | yes | yes |
| 319-241 | T-Mobile | CEDAR RPDS | 2002-03-07 | – | yes |
| 319-242 | AT&T | CEDARFALLS | 2002-03-28 | yes | yes |
| 319-243 | Lumen | CEDARFALLS | 2002-04-22 | yes | yes |
| 319-244 | MCC TELEPHONY LLC | ELY | 2006-11-14 | yes | yes |
| 319-245 | Windstream | GRUNDY CTR | 2015-06-25 | yes | yes |
| 319-246 | Onvoy | FT MADISON | – | yes | yes |
| 319-247 | Lumen | CEDAR RPDS | – | – | yes |
| 319-248 | Windstream | IOWA CITY | – | – | yes |
| 319-249 | Lumen | CEDAR RPDS | 2017-02-24 | yes | yes |
| 319-250 | Onvoy | FT MADISON | 2009-10-26 | yes | yes |
| 319-251 | AT&T | ANAMOSA | 2017-04-19 | yes | yes |
| 319-252 | AT&T | WATERLOO | 2016-06-29 | yes | yes |
| 319-253 | Windstream | HILLSBORO | – | yes | yes |
| 319-254 | Windstream | OLDS | – | yes | yes |
| 319-255 | LOCAL TELEPHONE DATA SERVICES CORP. | COLUMBSJCT | 2002-04-16 | yes | yes |
| 319-256 | FARMERS & MERCHANTS DBA KALON COOP TELE CO (KCTC) | WAYLAND | – | – | yes |
| 319-257 | Windstream | WINFIELD | – | yes | yes |
| 319-258 | Windstream | SALEM | – | yes | yes |
| 319-259 | Telnyx | IOWA CITY | 2017-06-29 | yes | yes |
| 319-260 | IMON COMMUNICATIONS, LLC - IA | CEDARFALLS | 2015-10-12 | – | yes |
| 319-261 | Windstream | CEDAR RPDS | – | yes | yes |
| 319-262 | MCC TELEPHONY LLC | KALONA | 2006-11-29 | yes | yes |
| 319-263 | Lumen | CEDAR RPDS | 2006-06-12 | yes | yes |
| 319-264 | UNITED STATES CELLULAR - IA | OELWEIN | 2017-08-07 | yes | yes |
| 319-265 | Windstream | CEDAR RPDS | – | yes | yes |
| 319-266 | Lumen | CEDARFALLS | – | – | yes |
| 319-267 | DUMONT TEL. CO. | ALLISON | – | – | yes |
| 319-268 | Lumen | CEDARFALLS | – | – | yes |
| 319-269 | UNITED STATES CELLULAR - IA | WATERLOO | – | yes | yes |
| 319-270 | Verizon | CEDAR RPDS | – | – | yes |
| 319-271 | UNITED STATES CELLULAR - IA | INDEPNDNCE | 2017-01-18 | yes | yes |
| 319-272 | Lumen | WATERLOO | – | – | yes |
| 319-273 | Lumen | CEDARFALLS | – | – | yes |
| 319-274 | Lumen | WATERLOO | – | yes | yes |
| 319-275 | BUTLER-BREMER MUTUAL TEL. CO. | FREDERIKA | – | – | yes |
| 319-276 | BUTLER-BREMER MUTUAL TEL. CO. | PLAINFIELD | – | – | yes |
| 319-277 | Lumen | CEDARFALLS | – | – | yes |
| 319-278 | BUTLER-BREMER MUTUAL TEL. CO. | CLARKSVL | – | – | yes |
| 319-279 | READLYN TEL. CO. | READLYN | – | – | yes |
| 319-280 | T-Mobile | KEOSAUQUA | 2018-07-23 | yes | yes |
| 319-281 | Lumen | HUDSON | 2017-05-23 | yes | yes |
| 319-282 | MCC TELEPHONY LLC | NO ENGLISH | 2006-11-14 | yes | yes |
| 319-283 | Lumen | OELWEIN | – | yes | yes |
| 319-284 | Bandwidth | OELWEIN | – | yes | yes |
| 319-285 | MCC TELEPHONY LLC | SHARON CTR | 2010-03-19 | yes | yes |
| 319-286 | Lumen | CEDAR RPDS | – | – | yes |
| 319-287 | Lumen | WATERLOO | – | – | yes |
| 319-288 | T-Mobile | KEOSAUQUA | 2005-11-11 | yes | yes |
| 319-289 | Vonage | CEDAR RPDS | 2018-06-04 | yes | yes |
| 319-290 | Verizon | WATERLOO | – | – | yes |
| 319-291 | Lumen | WATERLOO | – | – | yes |
| 319-292 | Lumen | WATERLOO | – | – | yes |
| 319-293 | VAN BUREN TEL. CO., INC. | KEOSAUQUA | – | – | yes |
| 319-294 | Lumen | CEDAR RPDS | – | – | yes |
| 319-295 | Lumen | CEDAR RPDS | – | – | yes |
| 319-296 | Lumen | WATERLOO | – | yes | yes |
| 319-297 | Lumen | CEDAR RPDS | – | – | yes |
| 319-298 | Lumen | CEDAR RPDS | – | – | yes |
| 319-299 | Windstream | BELLEPLAIN | 2016-07-28 | yes | yes |
| 319-300 | T-Mobile | WATERLOO | 2018-08-27 | yes | yes |
| 319-301 | MCC TELEPHONY LLC | SO ENGLISH | 2021-04-12 | yes | yes |
| 319-302 | AIRUS, INC - IA | CENTER PT | 2019-05-07 | yes | yes |
| 319-303 | AUREON COMMUNICATIONS, LLC | DENVER | 2021-10-27 | yes | yes |
| 319-304 | CSC WIRELESS, LLC | CEDAR RPDS | 2020-07-23 | yes | yes |
| 319-305 | AUREON COMMUNICATIONS, LLC | MT VERNON | 2021-10-27 | yes | yes |
| 319-306 | Lumen | JESUP | 2022-10-26 | yes | yes |
| 319-307 | Lumen | DUNKERTON | 2023-01-24 | yes | yes |
| 319-308 | Verizon | FT MADISON | 2020-08-18 | yes | yes |
| 319-309 | Lumen | GUERNSEY | 2023-01-24 | yes | yes |
| 319-310 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-312 | MCC TELEPHONY LLC | DYSART | 2010-03-23 | yes | yes |
| 319-313 | LOCAL TELEPHONE DATA SERVICES CORP. | KEOKUK | – | yes | yes |
| 319-314 | Lumen | READLYN | 2023-01-24 | yes | yes |
| 319-315 | Charter | ANAMOSA | 2021-06-21 | yes | yes |
| 319-316 | LOCAL TELEPHONE DATA SERVICES CORP. | FT MADISON | – | yes | yes |
| 319-317 | IP HORIZON LLC | CEDAR RPDS | 2021-04-01 | yes | yes |
| 319-318 | Telnyx | VINTON | – | yes | yes |
| 319-319 | Onvoy | IOWA CITY | 2022-09-27 | yes | yes |
| 319-320 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | CEDAR RPDS | 2015-04-09 | yes | yes |
| 319-321 | Verizon | IOWA CITY | – | – | yes |
| 319-322 | MCC TELEPHONY LLC | NORWAY | 2006-11-14 | yes | yes |
| 319-323 | AT&T | OELWEIN | 2020-06-16 | yes | yes |
| 319-324 | AT&T | BRIGHTON | 2020-09-21 | yes | yes |
| 319-325 | UNITED STATES CELLULAR - IA | IOWA CITY | 2001-03-09 | yes | yes |
| 319-326 | Bandwidth | INDEPNDNCE | 2020-07-21 | yes | yes |
| 319-327 | UNITED STATES CELLULAR - IA | INDEPNDNCE | 2005-04-26 | yes | yes |
| 319-328 | MCC TELEPHONY LLC | NEWHALL | 2006-11-14 | yes | yes |
| 319-329 | Verizon | CEDAR RPDS | – | – | yes |
| 319-330 | UNITED STATES CELLULAR - IA | IOWA CITY | – | yes | yes |
| 319-331 | Verizon | IOWA CITY | – | – | yes |
| 319-332 | INDEPENDENCE TELECOMMUNICATIONS UTILITY - IA | INDEPNDNCE | 2006-04-03 | yes | yes |
| 319-333 | MCC TELEPHONY LLC | IOWA CITY | 2010-03-19 | yes | yes |
| 319-334 | Lumen | INDEPNDNCE | – | yes | yes |
| 319-335 | Lumen | IOWA CITY | – | – | yes |
| 319-336 | MCC TELEPHONY LLC | HILLS | 2006-11-14 | yes | yes |
| 319-337 | Lumen | IOWA CITY | – | – | yes |
| 319-338 | Lumen | IOWA CITY | – | – | yes |
| 319-339 | Lumen | IOWA CITY | – | – | yes |
| 319-340 | T-Mobile | WATERLOO | 2022-07-27 | yes | yes |
| 319-341 | Lumen | IOWA CITY | – | – | yes |
| 319-342 | LA PORTE CITY TEL. CO. | LAPORTE CY | – | – | yes |
| 319-343 | Altice | CENTER PT | 2011-11-09 | yes | yes |
| 319-344 | Windstream | COLUMBSJCT | 2015-06-25 | yes | yes |
| 319-345 | Windstream | REINBECK | – | yes | yes |
| 319-346 | Lumen | PARKERSBG | – | yes | yes |
| 319-347 | Windstream | APLINGTON | – | yes | yes |
| 319-348 | FRACTEL, LLC | WATERLOO | 2019-12-17 | yes | yes |
| 319-349 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | WATERLOO | 2015-05-12 | yes | yes |
| 319-350 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-351 | Lumen | IOWA CITY | – | – | yes |
| 319-352 | Lumen | WAVERLY | – | – | yes |
| 319-353 | Lumen | IOWA CITY | – | – | yes |
| 319-354 | Lumen | IOWA CITY | – | – | yes |
| 319-355 | Lumen | CEDAR RPDS | 2005-03-08 | yes | yes |
| 319-356 | Lumen | IOWA CITY | – | – | yes |
| 319-357 | MCC TELEPHONY LLC | FAIRFAX | 2006-11-14 | yes | yes |
| 319-358 | Lumen | IOWA CITY | – | – | yes |
| 319-359 | MCC TELEPHONY LLC | IOWA CITY | 2012-07-11 | yes | yes |
| 319-360 | Verizon | CEDAR RPDS | – | – | yes |
| 319-361 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-362 | Lumen | CEDAR RPDS | – | – | yes |
| 319-363 | Lumen | CEDAR RPDS | – | – | yes |
| 319-364 | Lumen | CEDAR RPDS | – | – | yes |
| 319-365 | Lumen | CEDAR RPDS | – | – | yes |
| 319-366 | Lumen | CEDAR RPDS | – | yes | yes |
| 319-367 | Windstream | NEW LONDON | – | yes | yes |
| 319-368 | Lumen | CEDAR RPDS | – | – | yes |
| 319-369 | Lumen | CEDAR RPDS | – | – | yes |
| 319-370 | Charter | COGGON | 2021-06-21 | yes | yes |
| 319-371 | Verizon | FT MADISON | – | yes | yes |
| 319-372 | Lumen | FT MADISON | – | – | yes |
| 319-373 | Lumen | CEDAR RPDS | – | – | yes |
| 319-374 | AT&T | ORAN | 2022-02-22 | – | yes |
| 319-375 | Lumen | CEDAR RPDS | – | – | yes |
| 319-376 | Lumen | FT MADISON | – | yes | yes |
| 319-377 | Lumen | CEDAR RPDS | – | – | yes |
| 319-378 | Lumen | CEDAR RPDS | – | – | yes |
| 319-379 | HD CARRIER LLC | IOWA CITY | 2020-09-29 | yes | yes |
| 319-380 | STRATUS NETWORKS | BURLINGTON | 2020-11-25 | yes | yes |
| 319-381 | STRATUS NETWORKS | IOWA CITY | 2020-12-21 | yes | yes |
| 319-382 | NUSO, LLC | CEDAR RPDS | 2012-11-05 | yes | yes |
| 319-383 | AT&T | IOWA CITY | 2011-03-22 | yes | yes |
| 319-384 | Lumen | IOWA CITY | – | – | yes |
| 319-385 | Windstream | MTPLEASANT | – | – | yes |
| 319-386 | Lumen | MEDIAPOLIS | 2020-09-28 | yes | yes |
| 319-387 | Charter | CENTRAL CY | 2021-06-21 | yes | yes |
| 319-388 | Lumen | DONNELLSON | 2021-12-02 | yes | yes |
| 319-389 | Verizon | CEDAR RPDS | – | – | yes |
| 319-390 | Lumen | CEDAR RPDS | – | – | yes |
| 319-391 | NUSO, LLC | CEDAR RPDS | 2023-02-17 | yes | yes |
| 319-392 | DANVILLE MUTUAL TEL. CO. | DANVILLE | – | – | yes |
| 319-393 | Lumen | CEDAR RPDS | – | – | yes |
| 319-394 | MEDIAPOLIS TEL. CO. | MEDIAPOLIS | – | – | yes |
| 319-395 | Lumen | CEDAR RPDS | – | – | yes |
| 319-396 | Lumen | CEDAR RPDS | – | – | yes |
| 319-397 | VAN BUREN TEL. CO., INC. | CANTRIL | – | – | yes |
| 319-398 | Lumen | CEDAR RPDS | – | – | yes |
| 319-399 | Lumen | CEDAR RPDS | – | – | yes |
| 319-400 | AT&T | IOWA CITY | 2001-01-19 | yes | yes |
| 319-401 | AT&T | TRIPOLI | 2023-04-04 | yes | yes |
| 319-402 | Comcast | IOWA CITY | 2023-04-10 | yes | yes |
| 319-403 | Dish | CEDAR RPDS | 2023-04-10 | yes | yes |
| 319-404 | UNITED STATES CELLULAR - IA | WATERLOO | – | yes | yes |
| 319-405 | Bandwidth | ANAMOSA | 2022-01-27 | yes | yes |
| 319-406 | AT&T | DENVER | 2001-09-12 | yes | yes |
| 319-407 | UNITED STATES CELLULAR - IA | WAVERLY | 2021-12-14 | yes | yes |
| 319-408 | MCC TELEPHONY LLC | LISBON | 2010-03-09 | yes | yes |
| 319-409 | Windstream | CEDAR RPDS | 2011-11-23 | yes | yes |
| 319-410 | AUREON COMMUNICATIONS, LLC | OELWEIN | 2021-12-29 | yes | yes |
| 319-412 | T-Mobile | CEDAR RPDS | 2018-02-12 | yes | yes |
| 319-413 | Onvoy | TROY MILLS | 2023-04-11 | yes | yes |
| 319-414 | T-Mobile | KEOSAUQUA | 2023-08-18 | yes | yes |
| 319-415 | UNITED STATES CELLULAR - IA | WATERLOO | 2001-03-27 | yes | yes |
| 319-416 | NUSO, LLC | VINTON | 2023-06-14 | yes | yes |
| 319-417 | Verizon | FT MADISON | 2023-09-25 | yes | yes |
| 319-418 | HEART OF IOWA VENTURES, L.L.C. - IA | GRUNDY CTR | 2025-08-01 | yes | yes |
| 319-419 | T-Mobile | WAVERLY | 2018-03-09 | yes | yes |
| 319-420 | Onvoy | WATERLOO | 2023-06-29 | yes | yes |
| 319-421 | MCC TELEPHONY LLC | SHELL ROCK | 2006-11-14 | yes | yes |
| 319-422 | Onvoy | PARKERSBG | 2021-04-15 | yes | yes |
| 319-423 | AT&T | CEDAR RPDS | 2010-05-06 | yes | yes |
| 319-424 | WAVENATION, LLC | CEDAR RPDS | 2025-11-26 | yes | yes |
| 319-425 | MARTELLE COOP TEL ASC DBA MARTELLE COMM COOP IA | ANAMOSA | 2008-12-17 | – | yes |
| 319-426 | TON80 COMMUNICATIONS, LLC | FAIRBANK | 2022-02-17 | yes | yes |
| 319-427 | Verizon | WATERLOO | – | yes | yes |
| 319-428 | UNITED STATES CELLULAR - IA | BURLINGTON | 2023-12-11 | yes | yes |
| 319-429 | UNITED STATES CELLULAR - IA | WATERLOO | 2007-06-07 | yes | yes |
| 319-430 | UNITED STATES CELLULAR - IA | IOWA CITY | – | yes | yes |
| 319-431 | T-Mobile | CEDAR RPDS | – | yes | yes |
| 319-432 | Onvoy | CEDAR RPDS | 2008-07-24 | yes | yes |
| 319-433 | Windstream | WATERLOO | – | yes | yes |
| 319-434 | Altice | BELLEPLAIN | – | – | yes |
| 319-435 | Lumen | COGGON | – | yes | yes |
| 319-436 | FARMERS MUTUAL TEL. CO. | SHELLSBURG | – | – | yes |
| 319-437 | PRAIRIEBURG TEL. CO., INC. | PRAIRIEBG | – | – | yes |
| 319-438 | Windstream | CENTRAL CY | – | yes | yes |
| 319-439 | KEYSTONE FARMS COOP. TEL. CO. | ELBERON | – | – | yes |
| 319-440 | Verizon | CEDAR RPDS | – | yes | yes |
| 319-441 | Bandwidth | CENTER PT | 2022-01-14 | yes | yes |
| 319-442 | KEYSTONE FARMS COOP. TEL. CO. | KEYSTONE | – | – | yes |
| 319-443 | FARMERS MUTUAL TEL. CO. | URBANA | – | – | yes |
| 319-444 | Windstream | BELLEPLAIN | – | yes | yes |
| 319-445 | MCC TELEPHONY LLC | REINBECK | 2006-05-15 | yes | yes |
| 319-446 | ATKINS TEL. CO., INC. | ATKINS | – | – | yes |
| 319-447 | Lumen | CEDAR RPDS | – | yes | yes |
| 319-448 | Windstream | WALKER | – | yes | yes |
| 319-449 | Onvoy | CEDAR RPDS | 2014-03-07 | yes | yes |
| 319-450 | Verizon | CEDAR RPDS | – | yes | yes |
| 319-451 | Bandwidth | CEDAR RPDS | 2022-10-18 | yes | yes |
| 319-452 | Verizon | COLUMBSJCT | 2023-07-13 | yes | yes |
| 319-453 | FARMERS MUTUAL TEL. CO. | SHELLSBURG | – | – | yes |
| 319-454 | Altice | BLAIRSTOWN | – | yes | yes |
| 319-455 | Windstream | LISBON | – | yes | yes |
| 319-456 | Windstream | RICHLAND | – | yes | yes |
| 319-457 | T-Mobile | BURLINGTON | – | – | yes |
| 319-458 | Verizon | WASHINGTON | – | yes | yes |
| 319-459 | MCC TELEPHONY LLC | NO LIBERTY | 2010-03-08 | yes | yes |
| 319-460 | Verizon | WASHINGTON | – | yes | yes |
| 319-461 | UNITED STATES CELLULAR - IA | WASHINGTON | – | yes | yes |
| 319-462 | Lumen | ANAMOSA | – | yes | yes |
| 319-463 | Windstream | MONTROSE | – | yes | yes |
| 319-464 | AT&T | WATERLOO | – | yes | yes |
| 319-465 | Lumen | MONTICELLO | – | yes | yes |
| 319-466 | Lumen | IOWA CITY | – | – | yes |
| 319-467 | Lumen | IOWA CITY | – | – | yes |
| 319-468 | Onvoy | INDEPNDNCE | 2023-06-29 | yes | yes |
| 319-469 | Windstream | HOUGHTON | – | yes | yes |
| 319-470 | UNITED STATES CELLULAR - IA | FT MADISON | – | yes | yes |
| 319-471 | T-Mobile | IOWA CITY | – | yes | yes |
| 319-472 | Lumen | VINTON | – | yes | yes |
| 319-473 | T-Mobile | KEOKUK | 2001-05-30 | – | yes |
| 319-474 | Windstream | BRANDON | – | yes | yes |
| 319-475 | LA PORTE CITY TEL. CO. | MT AUBURN | – | – | yes |
| 319-476 | FARMERS COOP. TEL. CO. | DYSART | – | yes | yes |
| 319-477 | KEYSTONE FARMS COOP. TEL. CO. | GARRISON | – | – | yes |
| 319-478 | Windstream | TRAER | – | yes | yes |
| 319-479 | FARMERS COOP. TEL. CO. | CLUTIER | – | – | yes |
| 319-480 | UNITED STATES CELLULAR - IA | ANAMOSA | – | yes | yes |
| 319-481 | Verizon | ANAMOSA | – | yes | yes |
| 319-482 | MARTELLE COOP. TEL. ASSN. | MARTELLE | – | – | yes |
| 319-483 | Lumen | WAVERLY | – | yes | yes |
| 319-484 | OLIN TEL. CO., INC. | OLIN | – | – | yes |
| 319-485 | Windstream | IOWA CITY | 2024-02-15 | yes | yes |
| 319-486 | T-Mobile | WATERLOO | 2011-04-28 | yes | yes |
| 319-487 | Onvoy | CEDAR RPDS | 2024-03-28 | yes | yes |
| 319-488 | Verizon | KEYSTONE | 2011-02-21 | yes | yes |
| 319-489 | OLIN TEL. CO., INC. | MORLEY | – | – | yes |
| 319-490 | Onvoy | CEDARFALLS | 2024-04-29 | yes | yes |
| 319-491 | AT&T | CEDAR RPDS | – | yes | yes |
| 319-492 | Onvoy | IOWA CITY | 2024-06-18 | yes | yes |
| 319-493 | T-Mobile | WATERLOO | – | yes | yes |
| 319-494 | VAN BUREN TEL. CO., INC. | MTSTERLING | – | – | yes |
| 319-495 | MCC TELEPHONY LLC | LAPORTE CY | 2006-11-14 | yes | yes |
| 319-496 | T-Mobile | MONTICELLO | 2024-07-18 | yes | yes |
| 319-497 | Verizon | CEDAR RPDS | 2024-09-05 | yes | yes |
| 319-498 | VAN BUREN TEL. CO., INC. | BIRMINGHAM | – | – | yes |
| 319-499 | T-Mobile | IOWA CITY | 2011-03-25 | yes | yes |
| 319-500 | FRACTEL, LLC | VINTON | 2019-12-17 | yes | yes |
| 319-501 | T-Mobile | BRIGHTON | 2024-10-04 | yes | yes |
| 319-502 | Lumen | WATERLOO | 2024-11-14 | yes | yes |
| 319-503 | NUSO, LLC | CEDAR RPDS | 2025-03-03 | yes | yes |
| 319-504 | T-Mobile | WATERLOO | – | yes | yes |
| 319-505 | Verizon | WATERLOO | 2012-09-25 | yes | yes |
| 319-508 | T-Mobile | KEOSAUQUA | 2022-09-16 | yes | yes |
| 319-509 | T-Mobile | OELWEIN | – | – | yes |
| 319-510 | Verizon | BURLINGTON | 2025-09-03 | yes | yes |
| 319-512 | AT&T | IOWA CITY | – | yes | yes |
| 319-515 | Charter | CEDAR RPDS | 2023-12-05 | yes | yes |
| 319-519 | AIRUS, INC - IA | IOWA CITY | 2014-10-22 | yes | yes |
| 319-520 | Verizon | KEOKUK | – | yes | yes |
| 319-521 | T-Mobile | CEDAR RPDS | – | – | yes |
| 319-523 | Windstream | WAPELLO | – | yes | yes |
| 319-524 | Lumen | KEOKUK | – | – | yes |
| 319-525 | COOPERATIVE TEL. CO. | HARTWICK | – | – | yes |
| 319-526 | Lumen | KEOKUK | – | yes | yes |
| 319-527 | LOUISA COMMUNICATIONS, LC - IA | WAPELLO | – | yes | yes |
| 319-528 | Windstream | DENMARK | – | yes | yes |
| 319-529 | Verizon | WATERLOO | 2010-09-02 | yes | yes |
| 319-530 | UNITED STATES CELLULAR - IA | IOWA CITY | – | yes | yes |
| 319-531 | Verizon | CEDAR RPDS | – | yes | yes |
| 319-533 | T-Mobile | CEDAR RPDS | – | yes | yes |
| 319-534 | MCC TELEPHONY OF IOWA, LLC - IA | DANVILLE | 2007-01-30 | yes | yes |
| 319-535 | Bandwidth | MT VERNON | 2006-07-24 | yes | yes |
| 319-536 | Altice | CEDAR RPDS | 2011-11-10 | yes | yes |
| 319-537 | T-Mobile | MTPLEASANT | 2001-05-30 | – | yes |
| 319-538 | Onvoy | CEDAR RPDS | 2007-12-18 | yes | yes |
| 319-539 | Onvoy | RIVERSIDE | 2021-12-08 | yes | yes |
| 319-540 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-541 | Verizon | IOWA CITY | – | yes | yes |
| 319-543 | MCC TELEPHONY LLC | SOLON | 2006-03-28 | yes | yes |
| 319-545 | SOUTH SLOPE COOPERATIVE TELEPHONE COMPANY - IA | TIFFIN | – | – | yes |
| 319-548 | T-Mobile | WASHINGTON | – | – | yes |
| 319-549 | FARM & MERCH MUTUAL TELCO DBA KALONA COOP TEL | OLDS | 2014-11-11 | yes | yes |
| 319-550 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-551 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-552 | Windstream | MTPLEASANT | 2015-06-25 | yes | yes |
| 319-553 | Windstream | CEDARFALLS | – | yes | yes |
| 319-554 | T-Mobile | BRIGHTON | 2025-09-04 | yes | yes |
| 319-558 | Lumen | CEDAR RPDS | – | yes | yes |
| 319-559 | UNITED STATES CELLULAR - IA | WAVERLY | 2012-09-10 | yes | yes |
| 319-560 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-561 | T-Mobile | FT MADISON | 2001-05-30 | – | yes |
| 319-566 | TON80 COMMUNICATIONS, LLC | RICHLAND | 2022-03-14 | yes | yes |
| 319-569 | MCC TELEPHONY LLC | IOWA CITY | 2017-06-07 | yes | yes |
| 319-572 | UNITED STATES CELLULAR - IA | BURLINGTON | – | yes | yes |
| 319-573 | AT&T | CEDAR RPDS | 2001-01-19 | – | yes |
| 319-575 | Onvoy | CEDARFALLS | – | yes | yes |
| 319-576 | Windstream | BURLINGTON | – | yes | yes |
| 319-578 | MCC TELEPHONY LLC | SWISHER | 2006-11-14 | yes | yes |
| 319-582 | AIRESPRING, INC. | CEDAR RPDS | 2018-09-07 | yes | yes |
| 319-585 | MCC TELEPHONY LLC | HAZLETON | 2006-04-21 | yes | yes |
| 319-587 | EXIANT COMMUNICATIONS LLC | CEDAR RPDS | 2026-03-19 | yes | yes |
| 319-588 | TON80 COMMUNICATIONS, LLC | ARGYLE | 2022-02-24 | yes | yes |
| 319-589 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | ALBURNETT | 2015-05-14 | yes | yes |
| 319-591 | UNITED STATES CELLULAR - IA | WASHINGTON | – | yes | yes |
| 319-592 | VAN BUREN TEL. CO., INC. | BONAPARTE | – | – | yes |
| 319-594 | T-Mobile | IOWA CITY | – | yes | yes |
| 319-595 | MCC TELEPHONY LLC | WATERLOO | 2018-06-14 | yes | yes |
| 319-596 | Windstream | WAVERLY | – | yes | yes |
| 319-598 | LOCAL TELEPHONE DATA SERVICES CORP. | WASHINGTON | 2001-05-25 | yes | yes |
| 319-600 | FRACTEL, LLC | IOWA CITY | 2019-04-05 | yes | yes |
| 319-601 | T-Mobile | BURLINGTON | 2001-02-09 | yes | yes |
| 319-602 | Onvoy | HUDSON | – | yes | yes |
| 319-609 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | AURORA | 2015-05-14 | yes | yes |
| 319-610 | AT&T | WATERLOO | 2001-06-14 | yes | yes |
| 319-614 | AT&T | PACKWOOD | 2001-07-11 | yes | yes |
| 319-619 | T-Mobile | MONTROSE | 2021-06-23 | yes | yes |
| 319-621 | T-Mobile | IOWA CITY | – | yes | yes |
| 319-622 | SOUTH SLOPE COOP. TEL. CO., INC. | AMANA | – | – | yes |
| 319-623 | COOPERATIVE TEL. CO. | LADORA | – | – | yes |
| 319-624 | SOUTH SLOPE COOPERATIVE TELEPHONE COMPANY - IA | SOLON | – | – | yes |
| 319-625 | SOUTH SLOPE COOP. TEL. CO., INC. | NO LIBERTY | – | – | yes |
| 319-626 | SOUTH SLOPE COOP. TEL. CO., INC. | NO LIBERTY | – | – | yes |
| 319-627 | WEST LIBERTY TEL. CO. | W LIBERTY | – | – | yes |
| 319-628 | Windstream | OXFORD | – | yes | yes |
| 319-629 | Windstream | LONE TREE | – | yes | yes |
| 319-631 | T-Mobile | IOWA CITY | – | yes | yes |
| 319-632 | SOUTH SLOPE COOP. TEL. CO., INC. | NO LIBERTY | – | – | yes |
| 319-633 | MCC TELEPHONY LLC | LONE TREE | 2006-03-28 | yes | yes |
| 319-634 | EAST BUCHANAN TEL. COOP. | AURORA | – | – | yes |
| 319-635 | Windstream | FAIRBANK | – | yes | yes |
| 319-636 | Windstream | HAZLETON | – | yes | yes |
| 319-638 | ORAN MUTUAL TEL. CO. | ORAN | – | – | yes |
| 319-639 | MODERN COOP. TEL. CO. | KINROSS | – | – | yes |
| 319-640 | Verizon | CEDAR RPDS | – | yes | yes |
| 319-642 | Windstream | MARENGO | – | yes | yes |
| 319-643 | WEST LIBERTY TEL. CO. | WESTBRANCH | – | – | yes |
| 319-644 | Windstream | SOLON | – | yes | yes |
| 319-645 | Windstream | TIFFIN | – | yes | yes |
| 319-646 | WELLMAN COOP. TEL. ASSN. | WELLMAN | – | – | yes |
| 319-647 | COOPERATIVE TEL. CO. | VICTOR | – | – | yes |
| 319-648 | Windstream | RIVERSIDE | – | yes | yes |
| 319-651 | T-Mobile | CEDAR RPDS | – | yes | yes |
| 319-652 | MCC TELEPHONY LLC | TRAER | 2006-04-21 | yes | yes |
| 319-653 | Windstream | WASHINGTON | – | – | yes |
| 319-654 | Lumen | CEDAR RPDS | – | yes | yes |
| 319-655 | MODERN COOP. TEL. CO. | MILLERSBG | – | – | yes |
| 319-656 | KALONA COOP. TEL. CO. | KALONA | – | – | yes |
| 319-657 | Windstream | AINSWORTH | – | yes | yes |
| 319-658 | Windstream | CRAWFODSVL | – | yes | yes |
| 319-660 | Verizon | WILLIAMSBG | – | yes | yes |
| 319-661 | Verizon | WILLIAMSBG | – | yes | yes |
| 319-662 | Windstream | CONROY | – | yes | yes |
| 319-663 | TON80 COMMUNICATIONS, LLC | BLAIRSTOWN | 2022-02-17 | yes | yes |
| 319-664 | NORTH ENGLISH COOP. TEL. CO. | NO ENGLISH | – | – | yes |
| 319-665 | SOUTH SLOPE COOP. TEL. CO., INC. | NO LIBERTY | – | – | yes |
| 319-666 | FRACTEL, LLC | CEDARFALLS | 2019-01-28 | yes | yes |
| 319-667 | MODERN COOP. TEL. CO. | SO ENGLISH | – | – | yes |
| 319-668 | Windstream | WILLIAMSBG | – | yes | yes |
| 319-669 | AT&T | FT MADISON | 2001-06-05 | yes | yes |
| 319-670 | AT&T | KEOKUK | 2001-06-05 | yes | yes |
| 319-671 | AUREON COMMUNICATIONS, LLC | BURLINGTON | 2001-06-05 | yes | yes |
| 319-674 | MCC TELEPHONY LLC | WELLMAN | 2006-11-29 | yes | yes |
| 319-675 | TON80 COMMUNICATIONS, LLC | OXFORD | 2022-02-18 | yes | yes |
| 319-677 | Verizon | KEOSAUQUA | 2006-04-21 | yes | yes |
| 319-678 | Lumen | IOWA CITY | 2012-07-10 | yes | yes |
| 319-679 | SHARON TEL. CO. | HILLS | – | – | yes |
| 319-683 | SHARON TEL. CO. | SHARON CTR | – | – | yes |
| 319-685 | COOPERATIVE TEL. CO. | GUERNSEY | – | – | yes |
| 319-688 | Lumen | IOWA CITY | – | – | yes |
| 319-693 | AT&T | CEDAR RPDS | 2008-09-30 | yes | yes |
| 319-694 | Windstream | BRIGHTON | – | yes | yes |
| 319-695 | Windstream | PACKWOOD | – | yes | yes |
| 319-696 | Windstream | LOCKRIDGE | – | yes | yes |
| 319-698 | Windstream | W CHESTER | – | yes | yes |
| 319-699 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | ALLISON | 2015-05-14 | yes | yes |
| 319-701 | WIDE VOICE, LLC - IA | CEDAR RPDS | 2025-04-03 | yes | yes |
| 319-709 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | WINTHROP | 2015-05-14 | yes | yes |
| 319-710 | Charter | MTPLEASANT | 2024-02-06 | yes | yes |
| 319-712 | Onvoy | WALKER | 2024-06-05 | yes | yes |
| 319-719 | Onvoy | VINTON | 2022-11-28 | yes | yes |
| 319-720 | Windstream | CEDAR RPDS | 2008-12-17 | yes | yes |
| 319-721 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-722 | Windstream | WILLIAMSBG | 2015-06-25 | yes | yes |
| 319-723 | Windstream | NICHOLS | – | yes | yes |
| 319-725 | Windstream | CONESVILLE | – | yes | yes |
| 319-726 | Windstream | LETTS | – | yes | yes |
| 319-727 | Onvoy | COGGON | 2016-03-15 | yes | yes |
| 319-728 | Windstream | COLUMBSJCT | – | yes | yes |
| 319-729 | Windstream | GRANDVIEW | – | yes | yes |
| 319-730 | Windstream | CEDAR RPDS | – | – | yes |
| 319-731 | Windstream | CEDAR RPDS | – | – | yes |
| 319-732 | FRACTEL, LLC | KEOKUK | 2019-12-27 | yes | yes |
| 319-733 | TON80 COMMUNICATIONS, LLC | FARMINGTON | 2022-03-10 | yes | yes |
| 319-734 | Windstream | CEDAR RPDS | – | yes | yes |
| 319-738 | MODERN COOP. TEL. CO. | KESWICK | – | yes | yes |
| 319-739 | Windstream | CEDAR RPDS | – | – | yes |
| 319-741 | Altice | MARENGO | – | – | yes |
| 319-742 | TON80 COMMUNICATIONS, LLC | DENMARK | 2022-02-24 | yes | yes |
| 319-743 | Lumen | CEDAR RPDS | – | yes | yes |
| 319-745 | MCC TELEPHONY LLC | W LIBERTY | 2006-11-15 | yes | yes |
| 319-746 | TON80 COMMUNICATIONS, LLC | BRANDON | 2022-02-17 | yes | yes |
| 319-750 | Verizon | BURLINGTON | – | – | yes |
| 319-752 | Lumen | BURLINGTON | – | – | yes |
| 319-753 | Lumen | BURLINGTON | – | – | yes |
| 319-754 | Lumen | BURLINGTON | – | – | yes |
| 319-758 | Lumen | BURLINGTON | – | – | yes |
| 319-759 | UNITED STATES CELLULAR - IA | BURLINGTON | – | yes | yes |
| 319-766 | Windstream | OAKVILLE | – | yes | yes |
| 319-767 | TON80 COMMUNICATIONS, LLC | KEOKUK | 2022-03-24 | yes | yes |
| 319-768 | Lumen | BURLINGTON | – | yes | yes |
| 319-770 | Charter | WEST POINT | 2024-02-06 | yes | yes |
| 319-774 | Lumen | CEDAR RPDS | 2010-11-24 | yes | yes |
| 319-775 | Bandwidth | CEDAR RPDS | 2008-05-28 | yes | yes |
| 319-776 | TON80 COMMUNICATIONS, LLC | ROWLEY | 2022-03-25 | yes | yes |
| 319-777 | AUREON COMMUNICATIONS, LLC | CEDAR RPDS | 2011-04-15 | yes | yes |
| 319-779 | MCC TELEPHONY LLC | KALONA | 2010-03-19 | yes | yes |
| 319-784 | Lumen | CEDAR RPDS | – | yes | yes |
| 319-786 | Lumen | CEDAR RPDS | – | – | yes |
| 319-788 | REINBECK MUNICIPAL TELECOMMUNICATIONS UTILITY - IA | REINBECK | 2001-11-29 | – | yes |
| 319-789 | Windstream | WASHINGTON | 2015-06-25 | yes | yes |
| 319-790 | Windstream | CEDAR RPDS | – | yes | yes |
| 319-795 | UNITED STATES CELLULAR - IA | KEOKUK | – | yes | yes |
| 319-796 | VAN BUREN TEL. CO., INC. | STOCKPORT | – | – | yes |
| 319-799 | INTEGRATED PATH COMMUNCATIONS, LLC - IA | ATKINS | 2015-05-14 | yes | yes |
| 319-800 | Verizon | IOWA CITY | – | yes | yes |
| 319-804 | Onvoy | CEDAR RPDS | 2008-12-15 | yes | yes |
| 319-820 | Lumen | MONTICELLO | 2010-03-11 | yes | yes |
| 319-821 | T-Mobile | ANAMOSA | – | – | yes |
| 319-822 | DUNKERTON TEL. COOP. | DUNKERTON | – | – | yes |
| 319-823 | Verizon | GRUNDY CTR | 2003-07-17 | yes | yes |
| 319-824 | Windstream | GRUNDY CTR | – | yes | yes |
| 319-825 | AUREON COMMUNICATIONS, LLC | GRUNDY CTR | – | – | yes |
| 319-826 | MCC TELEPHONY LLC | CEDAR RPDS | 2010-03-10 | yes | yes |
| 319-827 | FARMERS MUTUAL TEL. CO. | JESUP | – | yes | yes |
| 319-828 | SOUTH SLOPE COOPERATIVE TELEPHONE COMPANY - IA | OXFORD | – | – | yes |
| 319-830 | Verizon | WATERLOO | – | yes | yes |
| 319-832 | Lumen | CEDAR RPDS | – | – | yes |
| 319-833 | Lumen | WATERLOO | – | – | yes |
| 319-834 | Lumen | IOWA CITY | – | yes | yes |
| 319-835 | Windstream | DONNELLSON | – | yes | yes |
| 319-836 | Windstream | PRIMROSE | – | yes | yes |
| 319-837 | Windstream | WEST POINT | – | yes | yes |
| 319-838 | Windstream | ARGYLE | – | yes | yes |
| 319-839 | Windstream | MARENGO | 2018-03-08 | yes | yes |
| 319-841 | SOUTH SLOPE COOP. TEL. CO., INC. | ELY | – | – | yes |
| 319-842 | FARMERS MUTUAL TEL. CO. | ALBURNETT | – | – | yes |
| 319-844 | MCC TELEPHONY LLC | MONTICELLO | 2010-03-19 | yes | yes |
| 319-845 | SOUTH SLOPE COOP. TEL. CO., INC. | FAIRFAX | – | – | yes |
| 319-846 | SOUTH SLOPE COOP. TEL. CO., INC. | FAIRFAX | – | – | yes |
| 319-848 | SOUTH SLOPE COOP. TEL. CO., INC. | ELY | – | – | yes |
| 319-849 | Lumen | CENTER PT | – | yes | yes |
| 319-850 | Verizon | BURLINGTON | – | yes | yes |
| 319-851 | PALO COOP. TEL. ASSN. | PALO | – | – | yes |
| 319-853 | Verizon | NO LIBERTY | 2007-02-14 | yes | yes |
| 319-854 | SPRINGVILLE COOP. TEL. ASSN., INC. | SPRINGVL | – | – | yes |
| 319-855 | AT&T | IOWA CITY | 2008-09-08 | yes | yes |
| 319-857 | SOUTH SLOPE COOP. TEL. CO., INC. | SWISHER | – | – | yes |
| 319-859 | Lumen | CEDARFALLS | – | yes | yes |
| 319-861 | Lumen | CEDAR RPDS | – | – | yes |
| 319-862 | Lumen | CEDAR RPDS | – | – | yes |
| 319-863 | Windstream | WASHINGTON | – | yes | yes |
| 319-864 | KALONA COOPERATIVE TELEPHONE COMPANY - IA | WASHINGTON | 2017-11-03 | yes | yes |
| 319-865 | Windstream | MOUNTUNION | – | yes | yes |
| 319-866 | Lumen | CEDAR RPDS | – | – | yes |
| 319-867 | COMMIO, LLC | IOWA CITY | 2019-06-24 | yes | yes |
| 319-868 | MUTUAL TEL. CO. OF MORNING SUN | MORNINGSUN | – | yes | yes |
| 319-874 | Lumen | WATERLOO | – | – | yes |
| 319-877 | MCC TELEPHONY LLC | WESTBRANCH | 2006-11-15 | yes | yes |
| 319-878 | Windstream | FARMINGTON | – | yes | yes |
| 319-880 | EDGETEL, LLC | MORNINGSUN | 2020-01-16 | yes | yes |
| 319-881 | Windstream | WAPELLO | 2015-06-25 | yes | yes |
| 319-882 | BUTLER-BREMER MUTUAL TEL. CO. | TRIPOLI | – | – | yes |
| 319-883 | Verizon | WATERLOO | 2009-03-24 | yes | yes |
| 319-884 | Windstream | APLINGTON | 2006-07-28 | yes | yes |
| 319-885 | BUTLER-BREMER MUTUAL TEL. CO. | SHELL ROCK | – | – | yes |
| 319-887 | Lumen | IOWA CITY | – | – | yes |
| 319-888 | Lumen | WATERLOO | – | yes | yes |
| 319-892 | Windstream | CEDAR RPDS | – | – | yes |
| 319-893 | Twilio | CEDAR RPDS | 2021-12-02 | yes | yes |
| 319-895 | Lumen | MT VERNON | – | yes | yes |
| 319-896 | Lumen | CEDAR RPDS | – | – | yes |
| 319-899 | Verizon | CEDAR RPDS | – | yes | yes |
| 319-900 | TERRA NOVA TELECOM INC. | CEDAR RPDS | 2019-02-22 | yes | yes |
| 319-910 | COMMIO, LLC | PARKERSBG | 2023-04-04 | yes | yes |
| 319-922 | TON80 COMMUNICATIONS, LLC | SALEM | 2022-03-14 | yes | yes |
| 319-929 | UNITED STATES CELLULAR - IA | CEDAR RPDS | – | yes | yes |
| 319-930 | UNITED STATES CELLULAR - IA | IOWA CITY | – | yes | yes |
| 319-931 | UNITED STATES CELLULAR - IA | MTPLEASANT | – | yes | yes |
| 319-933 | Onvoy | JANESVILLE | 2021-04-12 | yes | yes |
| 319-934 | EAST BUCHANAN TEL. COOP. | QUASQUETON | – | – | yes |
| 319-935 | EAST BUCHANAN TEL. COOP. | WINTHROP | – | – | yes |
| 319-936 | T-Mobile | IOWA CITY | – | – | yes |
| 319-937 | MEDIAPOLIS TEL. CO. | KINGSTON | – | – | yes |
| 319-938 | Windstream | ROWLEY | – | yes | yes |
| 319-939 | UNITED STATES CELLULAR - IA | WATERLOO | – | yes | yes |
| 319-942 | TON80 COMMUNICATIONS, LLC | HILLSBORO | 2022-03-04 | yes | yes |
| 319-946 | FRACTEL, LLC | MOUNTUNION | 2020-02-13 | yes | yes |
| 319-961 | T-Mobile | WATERLOO | – | – | yes |
| 319-966 | TON80 COMMUNICATIONS, LLC | GRANDVIEW | 2022-02-28 | yes | yes |
| 319-975 | UNITED STATES CELLULAR - IA | ANAMOSA | 2014-12-29 | yes | yes |
| 319-981 | T-Mobile | CEDAR RPDS | – | – | yes |
| 319-983 | Lumen | PARKERSBG | – | yes | yes |
| 319-984 | Lumen | DENVER | – | yes | yes |
| 319-985 | MEDIAPOLIS TEL. CO. | DODGEVILLE | – | – | yes |
| 319-986 | Windstream | MTPLEASANT | – | – | yes |
| 319-987 | Windstream | JANESVILLE | – | yes | yes |
| 319-988 | Lumen | HUDSON | – | yes | yes |
| 319-989 | Lumen | PARKERSBG | – | yes | yes |
| 319-990 | T-Mobile | BRIGHTON | 2025-03-31 | yes | yes |
| 319-992 | TON80 COMMUNICATIONS, LLC | TIFFIN | 2022-03-25 | yes | yes |
| 319-995 | TON80 COMMUNICATIONS, LLC | WINFIELD | 2022-03-15 | yes | yes |
| 319-996 | TON80 COMMUNICATIONS, LLC | HOUGHTON | 2022-03-04 | yes | yes |
| 319-997 | TON80 COMMUNICATIONS, LLC | NEW LONDON | 2022-03-10 | yes | yes |
| 319-999 | ATKINS TELEPHONE COMPANY, INC. - IA | CEDAR RPDS | 2008-05-01 | – | yes |
Frequently asked
How many prefixes does area code 319 have?
565 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 5,650 thousand-number ranges across 137 rate centers.
What do the first three digits after 319 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 319 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 319 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 388 of 319'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