Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 517 prefixes
616 of the 786 possible NXX blocks are assigned in area code 517 (78.4% of capacity), spread across 78 rate centers and 59 holders. The largest holders are MICHIGAN BELL TEL CO (105 blocks, 17.0%), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (61 blocks, 9.9%), ACD TELECOM, INC. - MI (56 blocks, 9.1%). Grouped by brand, AT&T accounts for 158 blocks; brand-attributable holders cover 76% 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 2001-01-25 to 2026-08-28, with 73 blocks handed out in 2002 alone. 411 blocks (67%) 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. 3 assigned blocks (389, 396, 471) are not yet in service: assigned to a carrier but not open for calls, so a caller ID from one is spoofed. 82 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
616 assigned blocks of 786
78 rate centers
59 holders of record
67% in thousands-block pooling
Largest holders in 517
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| MICHIGAN BELL TEL CO | AT&T | 105 | 17% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | Verizon | 61 | 9.9% |
| ACD TELECOM, INC. - MI | – | 56 | 9.1% |
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | T-Mobile | 47 | 7.6% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 40 | 6.5% |
| ONVOY, LLCV - MI | Onvoy | 30 | 4.9% |
| LEVEL 3 COMMUNICATIONS, LLC - MI | Lumen | 30 | 4.9% |
| FRONTIER NORTH, INC. - MI | Frontier | 30 | 4.9% |
| INTERACTIVE SERVICES NETWORK, INC. | – | 29 | 4.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | Verizon | 17 | 2.8% |
| FRONTIER COMMUNICATIONS OF MICHIGAN, INC. | Frontier | 14 | 2.3% |
| 123.NET, LLC | – | 14 | 2.3% |
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.
LANSING 164JACKSON 63ADRIAN 27HOWELL 27HILLSDALE 15CHARLOTTE 15COLDWATER 14HOLT 13DIMONDALE 12FOWLERVL 11MASON 11ALBION 11DANSVILLE 8GRANDLEDGE 8PORTLAND 7EATON RPD 7TECUMSEH 7LESLIE 6DE WITT 6HUDSON 6JONESVILLE 6ONONDAGA 6LITCHFIELD 5POTTERVL 5ADDISON 5STOCKBDG 5BLISSFIELD 5MUNITH 5TEKONSHA 5CLINTON 4NASHVILLE 4READING 4SUNFIELD 4MORENCI 4ONSTED 4LAINGSBURG 4WEBBERVL 4HOMER 4RIVES JCT 4PARMA 4BURLINGTON 4WILLIAMSTN 4BRITTON 3SHAFTSBURG 3MONTGOMERY 3CLARKLAKE 3MULLIKEN 3BATH 3BUNDY HILL 3GRASS LAKE 3FITCHBURG 3VERMONTVL 3
All 616 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 |
|---|---|---|---|---|---|
| 517-200 | AT&T | LITCHFIELD | 2004-03-15 | yes | yes |
| 517-201 | Onvoy | LESLIE | 2016-03-08 | yes | yes |
| 517-202 | T-Mobile | LANSING | – | yes | yes |
| 517-203 | AT&T | LANSING | – | yes | yes |
| 517-204 | T-Mobile | LANSING | – | yes | yes |
| 517-205 | AT&T | JACKSON | 2014-04-17 | yes | yes |
| 517-206 | T-Mobile | JACKSON | – | yes | yes |
| 517-207 | INTERACTIVE SERVICES NETWORK, INC. | ADRIAN | – | – | yes |
| 517-208 | Lumen | BRITTON | 2014-03-13 | yes | yes |
| 517-209 | Bandwidth | HOLT | 2009-05-04 | yes | yes |
| 517-210 | Onvoy | POTTERVL | 2016-03-08 | yes | yes |
| 517-212 | Verizon | HILLSDALE | 2004-04-16 | yes | yes |
| 517-213 | Lumen | CHARLOTTE | – | yes | yes |
| 517-214 | T-Mobile | LANSING | – | yes | yes |
| 517-215 | T-Mobile | ADRIAN | 2010-01-14 | yes | yes |
| 517-216 | CSC WIRELESS, LLC | LANSING | 2020-06-25 | yes | yes |
| 517-217 | TC3 TELECOM, INC. - MI | CLINTON | – | – | yes |
| 517-218 | AT&T | PORTLAND | 2023-11-16 | yes | yes |
| 517-219 | Lumen | FOWLERVL | 2004-06-23 | yes | yes |
| 517-220 | Lumen | LANSING | 2015-10-14 | yes | yes |
| 517-221 | AT&T | HOLT | 2016-04-12 | yes | yes |
| 517-222 | Verizon | DANSVILLE | 2005-09-15 | yes | yes |
| 517-223 | AT&T | FOWLERVL | – | – | yes |
| 517-224 | Lumen | POTTERVL | 2004-10-20 | yes | yes |
| 517-225 | AT&T | HOWELL | 2015-11-16 | yes | yes |
| 517-226 | American Messaging | LANSING | – | – | yes |
| 517-227 | Verizon | COLDWATER | 2003-04-29 | yes | yes |
| 517-228 | Spok | LANSING | – | – | yes |
| 517-229 | Spok | LANSING | – | – | yes |
| 517-230 | Verizon | LANSING | – | – | yes |
| 517-231 | Verizon | CHARLOTTE | – | – | yes |
| 517-232 | Spok | LANSING | – | – | yes |
| 517-233 | Verizon | EATON RPD | 2005-03-16 | yes | yes |
| 517-234 | AT&T | HOWELL | 2016-11-08 | yes | yes |
| 517-235 | AT&T | DIMONDALE | 2010-12-07 | yes | yes |
| 517-236 | Verizon | DIMONDALE | – | yes | yes |
| 517-237 | Onvoy | LANSING | – | yes | yes |
| 517-238 | Frontier | COLDWTR LK | – | yes | yes |
| 517-239 | Frontier | DE WITT | 2015-04-23 | yes | yes |
| 517-240 | T-Mobile | JACKSON | 2010-03-29 | yes | yes |
| 517-241 | AT&T | LANSING | – | – | yes |
| 517-242 | Verizon | LANSING | – | – | yes |
| 517-243 | Verizon | LANSING | – | – | yes |
| 517-244 | AT&T | MASON | – | yes | yes |
| 517-245 | Verizon | FOWLERVL | 2015-09-17 | yes | yes |
| 517-246 | Peerless | LANSING | 2019-08-01 | yes | yes |
| 517-247 | AT&T | JACKSON | 2019-05-14 | yes | yes |
| 517-249 | AT&T | LANSING | 2017-03-08 | yes | yes |
| 517-250 | AT&T | JACKSON | – | yes | yes |
| 517-251 | American Messaging | LANSING | – | – | yes |
| 517-252 | AT&T | ADDISON | – | yes | yes |
| 517-253 | AT&T | LANSING | 2013-04-19 | yes | yes |
| 517-254 | Frontier | FRONTIER | – | – | yes |
| 517-255 | American Messaging | LANSING | – | – | yes |
| 517-256 | Verizon | LANSING | – | – | yes |
| 517-257 | Verizon | JACKSON | 2017-04-26 | yes | yes |
| 517-258 | Bandwidth | HOWELL | 2012-03-12 | yes | yes |
| 517-259 | Verizon | JACKSON | 2025-02-25 | yes | yes |
| 517-260 | Verizon | ADRIAN | – | – | yes |
| 517-261 | T-Mobile | GRANDLEDGE | 2020-10-20 | yes | yes |
| 517-262 | Verizon | JACKSON | – | – | yes |
| 517-263 | Frontier | ADRIAN | – | – | yes |
| 517-264 | Frontier | ADRIAN | – | – | yes |
| 517-265 | Frontier | ADRIAN | – | – | yes |
| 517-266 | Frontier | ADRIAN | – | – | yes |
| 517-267 | AT&T | LANSING | – | – | yes |
| 517-268 | Verizon | HOLT | – | yes | yes |
| 517-270 | AT&T | ADRIAN | – | yes | yes |
| 517-271 | Onvoy | NASHVILLE | 2020-10-26 | yes | yes |
| 517-272 | AT&T | LANSING | – | yes | yes |
| 517-273 | AT&T | HOWELL | 2017-07-26 | yes | yes |
| 517-274 | Onvoy | SHAFTSBURG | 2021-06-25 | yes | yes |
| 517-275 | WIRETAP TELECOM, LLC. | LANSING | 2017-03-30 | yes | yes |
| 517-276 | Onvoy | HUDSON | 2021-06-25 | yes | yes |
| 517-277 | WESTPHALIA BROADBAND, INC. - MI | DE WITT | 2004-10-27 | – | yes |
| 517-278 | Frontier | COLDWATER | – | – | yes |
| 517-279 | Frontier | COLDWATER | – | – | yes |
| 517-280 | T-Mobile | ADRIAN | 2021-01-19 | yes | yes |
| 517-281 | Verizon | LANSING | – | – | yes |
| 517-282 | Verizon | LANSING | – | – | yes |
| 517-283 | Frontier | READING | – | yes | yes |
| 517-284 | AT&T | LANSING | 2011-08-11 | yes | yes |
| 517-285 | Verizon | LANSING | – | – | yes |
| 517-286 | WALDRON TEL. CO. | WALDRON | – | – | yes |
| 517-287 | Frontier | NORTHADAMS | – | – | yes |
| 517-288 | AT&T | SUNFIELD | 2004-12-20 | yes | yes |
| 517-289 | Onvoy | LANSING | – | yes | yes |
| 517-290 | Verizon | LANSING | – | – | yes |
| 517-291 | STRATUS NETWORKS | ADRIAN | 2021-03-19 | yes | yes |
| 517-292 | AT&T | HOWELL | – | yes | yes |
| 517-293 | Onvoy | LESLIE | 2021-07-29 | yes | yes |
| 517-294 | Verizon | FOWLERVL | – | – | yes |
| 517-295 | Bandwidth | HOWELL | 2013-03-08 | yes | yes |
| 517-296 | Frontier | MONTGOMERY | – | yes | yes |
| 517-297 | AT&T | HILLSDALE | 2021-09-03 | yes | yes |
| 517-298 | Charter | MORENCI | – | yes | yes |
| 517-299 | Bandwidth | LANSING | 2023-01-25 | yes | yes |
| 517-300 | Onvoy | ONSTED | 2019-10-10 | yes | yes |
| 517-301 | AT&T | TECUMSEH | – | yes | yes |
| 517-302 | T-Mobile | FOWLERVL | 2021-10-15 | yes | yes |
| 517-303 | T-Mobile | LANSING | 2001-10-01 | yes | yes |
| 517-304 | AT&T | HOWELL | – | – | yes |
| 517-305 | Lumen | CLARKLAKE | 2008-09-16 | yes | yes |
| 517-306 | AT&T | HUDSON | – | yes | yes |
| 517-307 | AT&T | JACKSON | 2025-10-06 | yes | yes |
| 517-308 | Verizon | DIMONDALE | – | yes | yes |
| 517-309 | Spok | COLDWATER | – | – | yes |
| 517-310 | AT&T | MULLIKEN | 2023-08-29 | yes | yes |
| 517-312 | Frontier | ADRIAN | 2015-04-23 | yes | yes |
| 517-314 | NUSO, LLC | JACKSON | 2023-03-03 | yes | yes |
| 517-315 | AT&T | JACKSON | – | yes | yes |
| 517-316 | AT&T | LANSING | – | yes | yes |
| 517-317 | AT&T | COLDWATER | – | yes | yes |
| 517-318 | Verizon | LANSING | – | yes | yes |
| 517-319 | Verizon | LANSING | – | yes | yes |
| 517-320 | Verizon | HILLSDALE | – | – | yes |
| 517-321 | AT&T | LANSING | – | – | yes |
| 517-322 | AT&T | LANSING | – | – | yes |
| 517-323 | AT&T | LANSING | – | – | yes |
| 517-324 | AT&T | LANSING | – | – | yes |
| 517-325 | AT&T | LANSING | – | yes | yes |
| 517-326 | Dish | LANSING | 2021-12-14 | yes | yes |
| 517-327 | AT&T | LANSING | – | – | yes |
| 517-328 | IP HORIZON LLC | LANSING | 2021-01-28 | yes | yes |
| 517-329 | VoIP Innovations | LANSING | 2019-06-17 | yes | yes |
| 517-330 | INTERACTIVE SERVICES NETWORK, INC. | LITCHFIELD | 2004-12-06 | – | yes |
| 517-331 | Verizon | LANSING | – | yes | yes |
| 517-332 | AT&T | LANSING | – | – | yes |
| 517-333 | AT&T | LANSING | – | – | yes |
| 517-334 | AT&T | LANSING | – | yes | yes |
| 517-335 | AT&T | LANSING | – | – | yes |
| 517-336 | AT&T | LANSING | – | yes | yes |
| 517-337 | AT&T | LANSING | – | – | yes |
| 517-338 | Verizon | HOWELL | – | yes | yes |
| 517-339 | AT&T | LANSING | – | – | yes |
| 517-340 | Spok | LANSING | – | – | yes |
| 517-341 | Spok | LANSING | – | – | yes |
| 517-342 | AT&T | LANSING | – | yes | yes |
| 517-343 | WOW! INTERNET, CABLE AND PHONE | ALBION | 2012-04-03 | yes | yes |
| 517-344 | NUSO, LLC | JACKSON | 2021-12-21 | yes | yes |
| 517-345 | Verizon | DIMONDALE | 2005-03-16 | yes | yes |
| 517-346 | AT&T | LANSING | – | – | yes |
| 517-347 | AT&T | LANSING | – | – | yes |
| 517-348 | Onvoy | LANSING | 2009-02-06 | yes | yes |
| 517-349 | AT&T | LANSING | – | – | yes |
| 517-350 | HD CARRIER LLC | LANSING | 2023-03-10 | yes | yes |
| 517-351 | AT&T | LANSING | – | – | yes |
| 517-352 | Onvoy | BATH | 2023-07-05 | yes | yes |
| 517-353 | AT&T | LANSING | – | – | yes |
| 517-354 | Onvoy | LAINGSBURG | 2023-07-05 | yes | yes |
| 517-355 | AT&T | LANSING | – | – | yes |
| 517-356 | FRACTEL, LLC | LANSING | 2019-11-22 | yes | yes |
| 517-357 | Frontier | CAMBRIA | – | – | yes |
| 517-358 | T-Mobile | JACKSON | – | yes | yes |
| 517-359 | Onvoy | STOCKBDG | 2023-07-05 | yes | yes |
| 517-360 | American Messaging | LANSING | – | – | yes |
| 517-361 | Bandwidth | NASHVILLE | 2025-11-20 | yes | yes |
| 517-362 | T-Mobile | MASON | 2024-02-21 | yes | yes |
| 517-363 | AT&T | LANSING | – | – | yes |
| 517-364 | AT&T | LANSING | – | – | yes |
| 517-365 | Onvoy | WEBBERVL | 2023-07-05 | yes | yes |
| 517-366 | T-Mobile | ADRIAN | 2010-04-02 | yes | yes |
| 517-367 | AT&T | LANSING | – | – | yes |
| 517-368 | Frontier | CAMDEN | – | – | yes |
| 517-369 | Frontier | BRONSON | – | yes | yes |
| 517-370 | Onvoy | MONTGOMERY | 2023-07-05 | yes | yes |
| 517-371 | AT&T | LANSING | – | – | yes |
| 517-372 | AT&T | LANSING | – | – | yes |
| 517-373 | AT&T | LANSING | – | – | yes |
| 517-374 | AT&T | LANSING | – | – | yes |
| 517-375 | Verizon | FOWLERVL | 2002-10-24 | – | yes |
| 517-376 | Comcast | HOWELL | – | yes | yes |
| 517-377 | AT&T | LANSING | – | yes | yes |
| 517-378 | AT&T | POTTERVL | 2021-10-04 | yes | yes |
| 517-379 | Bandwidth | BUNDY HILL | 2024-08-20 | yes | yes |
| 517-380 | T-Mobile | HOWELL | 2024-01-17 | yes | yes |
| 517-381 | AT&T | LANSING | – | – | yes |
| 517-382 | Comcast | LESLIE | 2024-09-16 | yes | yes |
| 517-383 | Frontier | PRATTVILLE | – | – | yes |
| 517-384 | AT&T | CHARLOTTE | 2024-10-23 | yes | yes |
| 517-385 | WAVENATION, LLC | LANSING | 2026-01-29 | yes | yes |
| 517-386 | Verizon | EATON RPD | 2004-03-05 | yes | yes |
| 517-387 | AT&T | HILLSDALE | 2026-04-27 | yes | yes |
| 517-388 | Verizon | LANSING | – | yes | yes |
| 517-389 | AT&T | ADRIAN | 2026-06-24 | yes | no |
| 517-390 | American Messaging | JACKSON | – | – | yes |
| 517-391 | T-Mobile | LANSING | – | yes | yes |
| 517-392 | T-Mobile | JACKSON | – | yes | yes |
| 517-393 | AT&T | LANSING | – | – | yes |
| 517-394 | AT&T | LANSING | – | – | yes |
| 517-395 | Verizon | JACKSON | 2009-12-08 | yes | yes |
| 517-396 | Verizon | JACKSON | 2026-08-28 | yes | no |
| 517-398 | AT&T | HILLSDALE | – | yes | yes |
| 517-399 | TON80 COMMUNICATIONS, LLC | EATON RPD | 2022-02-22 | yes | yes |
| 517-400 | Charter | LANSING | 2019-10-29 | yes | yes |
| 517-401 | AT&T | MORENCI | – | yes | yes |
| 517-402 | T-Mobile | LANSING | – | – | yes |
| 517-403 | T-Mobile | ADRIAN | – | yes | yes |
| 517-404 | T-Mobile | HOWELL | – | yes | yes |
| 517-407 | American Messaging | JONESVILLE | – | – | yes |
| 517-408 | Comcast | DIMONDALE | 2007-04-12 | yes | yes |
| 517-409 | Twilio | BLISSFIELD | – | yes | yes |
| 517-410 | T-Mobile | LANSING | – | yes | yes |
| 517-412 | AT&T | GRANDLEDGE | 2010-05-26 | yes | yes |
| 517-414 | T-Mobile | JACKSON | – | yes | yes |
| 517-416 | Verizon | JACKSON | 2001-10-01 | yes | yes |
| 517-417 | TC3 TELECOM, INC. - MI | ADRIAN | – | – | yes |
| 517-418 | AT&T | HOMER | – | yes | yes |
| 517-420 | Verizon | LANSING | – | – | yes |
| 517-423 | Frontier | TECUMSEH | – | – | yes |
| 517-424 | Frontier | TECUMSEH | – | yes | yes |
| 517-425 | Verizon | HILLSDALE | – | yes | yes |
| 517-426 | TON80 COMMUNICATIONS, LLC | MUNITH | 2022-02-22 | yes | yes |
| 517-427 | TON80 COMMUNICATIONS, LLC | RIVES JCT | 2022-02-24 | yes | yes |
| 517-428 | T-Mobile | FOWLERVL | 2019-01-23 | yes | yes |
| 517-429 | Lumen | HUDSON | 2014-03-12 | yes | yes |
| 517-431 | Frontier | TIPTON | – | yes | yes |
| 517-432 | AT&T | LANSING | – | – | yes |
| 517-435 | Verizon | JACKSON | 2013-10-04 | yes | yes |
| 517-436 | SAND CREEK TEL. CO. | SAND CREEK | – | yes | yes |
| 517-437 | AT&T | HILLSDALE | – | – | yes |
| 517-438 | Verizon | ADRIAN | – | yes | yes |
| 517-439 | AT&T | HILLSDALE | – | – | yes |
| 517-440 | NUSO, LLC | LANSING | 2021-12-02 | yes | yes |
| 517-441 | Lumen | EATON RPD | – | yes | yes |
| 517-442 | AT&T | ADRIAN | – | yes | yes |
| 517-443 | OGDEN TEL. CO. | OGDEN CTR | – | yes | yes |
| 517-444 | Verizon | CHARLOTTE | 2005-03-16 | yes | yes |
| 517-445 | COMMUNICATIONS CORP. OF MI | CLAYTON | – | yes | yes |
| 517-446 | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | ONSTED | – | yes | yes |
| 517-447 | DEERFIELD FARMERS TEL. CO. | DEERFIELD | – | yes | yes |
| 517-448 | Frontier | HUDSON | – | yes | yes |
| 517-449 | Verizon | LANSING | – | – | yes |
| 517-451 | Frontier | BRITTON | – | yes | yes |
| 517-455 | Windstream | LANSING | 2005-08-18 | yes | yes |
| 517-456 | Frontier | CLINTON | – | yes | yes |
| 517-457 | Peerless | TIPTON | 2014-05-30 | yes | yes |
| 517-458 | Frontier | MORENCI | – | yes | yes |
| 517-459 | Lumen | PARMA | 2009-11-17 | yes | yes |
| 517-462 | Verizon | COLDWATER | 2004-04-19 | yes | yes |
| 517-464 | American Messaging | JACKSON | – | – | yes |
| 517-465 | AT&T | ALBION | 2009-12-22 | yes | yes |
| 517-466 | Verizon | DANSVILLE | 2005-02-11 | yes | yes |
| 517-467 | Frontier | ONSTED | – | yes | yes |
| 517-468 | SHIAWASSEE TEL. CO. | BELL OAK | – | yes | yes |
| 517-470 | TC3 TELECOM, INC. - MI | TECUMSEH | – | – | yes |
| 517-471 | VoIP Innovations | ONONDAGA | 2026-07-24 | yes | no |
| 517-474 | AT&T | JACKSON | – | yes | yes |
| 517-477 | AT&T | HOLT | 2004-12-20 | yes | yes |
| 517-480 | AT&T | STOCKBDG | – | yes | yes |
| 517-481 | AT&T | LANSING | – | yes | yes |
| 517-482 | AT&T | LANSING | – | – | yes |
| 517-483 | AT&T | LANSING | – | yes | yes |
| 517-484 | AT&T | LANSING | – | – | yes |
| 517-485 | AT&T | LANSING | – | – | yes |
| 517-486 | Frontier | BLISSFIELD | – | yes | yes |
| 517-487 | AT&T | LANSING | – | – | yes |
| 517-488 | Windstream | LANSING | 2005-02-07 | yes | yes |
| 517-489 | Onvoy | LANSING | 2010-04-02 | yes | yes |
| 517-490 | T-Mobile | LANSING | 2002-08-13 | yes | yes |
| 517-492 | Onvoy | LANSING | – | yes | yes |
| 517-494 | AT&T | ALBION | – | yes | yes |
| 517-499 | Verizon | JACKSON | – | yes | yes |
| 517-500 | Onvoy | SUNFIELD | 2018-09-25 | yes | yes |
| 517-502 | TC3 TELECOM, INC. - MI | HUDSON | – | – | yes |
| 517-504 | TC3 TELECOM, INC. - MI | MORENCI | – | – | yes |
| 517-505 | T-Mobile | LANSING | – | – | yes |
| 517-507 | Lumen | LANSING | – | yes | yes |
| 517-510 | Onvoy | CLAYTON | 2021-05-19 | yes | yes |
| 517-512 | Verizon | LANSING | – | yes | yes |
| 517-513 | Verizon | JACKSON | – | yes | yes |
| 517-514 | T-Mobile | CLINTON | 2021-06-23 | yes | yes |
| 517-515 | AT&T | LANSING | 2008-03-10 | yes | yes |
| 517-516 | Charter | ONSTED | 2021-05-19 | yes | yes |
| 517-518 | AT&T | HOWELL | 2002-08-23 | yes | yes |
| 517-519 | INTERACTIVE SERVICES NETWORK, INC. | HUDSON | 2001-11-13 | – | yes |
| 517-521 | Frontier | WEBBERVL | – | yes | yes |
| 517-522 | Frontier | GRASS LAKE | – | yes | yes |
| 517-523 | Frontier | OSSEO | – | – | yes |
| 517-524 | Frontier | CONCORD | – | – | yes |
| 517-525 | Verizon | MASON | – | – | yes |
| 517-526 | Verizon | PORTLAND | – | yes | yes |
| 517-528 | T-Mobile | LANSING | 2010-08-05 | yes | yes |
| 517-529 | AT&T | CLARKLAKE | – | yes | yes |
| 517-531 | Frontier | PARMA | – | yes | yes |
| 517-534 | Spok | JACKSON | – | – | yes |
| 517-536 | AT&T | NAPOLEON | – | yes | yes |
| 517-537 | Onvoy | HOWELL | 2021-05-19 | yes | yes |
| 517-539 | Verizon | JACKSON | 2015-03-13 | yes | yes |
| 517-540 | AT&T | HOWELL | – | yes | yes |
| 517-541 | AT&T | CHARLOTTE | – | yes | yes |
| 517-542 | Brightspeed | LITCHFIELD | – | – | yes |
| 517-543 | AT&T | CHARLOTTE | – | – | yes |
| 517-544 | 123.NET, LLC | JACKSON | 2002-08-12 | – | yes |
| 517-545 | AT&T | HOWELL | – | – | yes |
| 517-546 | AT&T | HOWELL | – | – | yes |
| 517-547 | Frontier | ADDISON | – | yes | yes |
| 517-548 | AT&T | HOWELL | – | – | yes |
| 517-549 | Brightspeed | MOSHERVL | – | – | yes |
| 517-550 | Onvoy | DIMONDALE | 2018-08-22 | yes | yes |
| 517-551 | T-Mobile | FOWLERVL | 2023-03-16 | yes | yes |
| 517-552 | AT&T | HOWELL | – | – | yes |
| 517-553 | T-Mobile | HOWELL | 2021-09-29 | yes | yes |
| 517-554 | Verizon | ALBION | 2002-09-16 | yes | yes |
| 517-557 | Charter | BRITTON | 2021-05-19 | yes | yes |
| 517-563 | Frontier | HANOVER | – | – | yes |
| 517-564 | Spok | ADRIAN | – | – | yes |
| 517-565 | Frontier | FITCHBURG | – | yes | yes |
| 517-566 | Brightspeed | SUNFIELD | – | yes | yes |
| 517-567 | Frontier | RANSOM | – | – | yes |
| 517-568 | Frontier | HOMER | – | yes | yes |
| 517-569 | Frontier | RIVES JCT | – | yes | yes |
| 517-571 | Spok | HOWELL | – | – | yes |
| 517-574 | CLEAR RATE COMMUNICATIONS, LLC | LANSING | 2008-04-10 | yes | yes |
| 517-575 | AT&T | LANSING | – | yes | yes |
| 517-577 | Comcast | ADRIAN | – | yes | yes |
| 517-579 | Lumen | HOWELL | – | yes | yes |
| 517-580 | Lumen | LANSING | – | yes | yes |
| 517-581 | Verizon | JACKSON | – | – | yes |
| 517-582 | Verizon | LANSING | – | yes | yes |
| 517-583 | Lumen | TEKONSHA | 2002-08-19 | yes | yes |
| 517-584 | 123.NET, LLC | ALBION | 2002-08-12 | – | yes |
| 517-586 | Windstream | HOWELL | – | yes | yes |
| 517-587 | AHOI LLC | LANSING | 2026-06-02 | yes | yes |
| 517-588 | T-Mobile | CHARLOTTE | 2002-06-25 | yes | yes |
| 517-589 | AT&T | LESLIE | – | yes | yes |
| 517-592 | Frontier | BROOKLYN | – | – | yes |
| 517-594 | ACD TELECOM, INC. - MI | OSSEO | 2002-06-19 | yes | yes |
| 517-595 | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | WALDRON | 2002-06-18 | yes | yes |
| 517-596 | Frontier | MUNITH | – | yes | yes |
| 517-597 | ACD TELECOM, INC. - MI | SUNFIELD | 2002-06-18 | yes | yes |
| 517-599 | Verizon | LANSING | – | – | yes |
| 517-600 | Verizon | DIMONDALE | 2005-10-17 | yes | yes |
| 517-604 | Verizon | MASON | 2002-08-19 | yes | yes |
| 517-605 | T-Mobile | ADRIAN | – | yes | yes |
| 517-606 | TC3 TELECOM, INC. - MI | BLISSFIELD | – | – | yes |
| 517-607 | AT&T | HILLSDALE | – | yes | yes |
| 517-609 | 123.NET, LLC | JONESVILLE | 2002-08-12 | – | yes |
| 517-610 | T-Mobile | HILLSDALE | 2002-06-26 | yes | yes |
| 517-612 | T-Mobile | JACKSON | 2002-04-25 | yes | yes |
| 517-614 | Verizon | LANSING | 2002-09-17 | – | yes |
| 517-615 | AT&T | VERMONTVL | 2002-05-20 | yes | yes |
| 517-616 | Onvoy | DIMONDALE | 2008-10-28 | yes | yes |
| 517-617 | AT&T | COLDWATER | – | – | yes |
| 517-618 | Lumen | HOWELL | – | yes | yes |
| 517-619 | AT&T | LANSING | 2017-10-11 | yes | yes |
| 517-621 | INTERACTIVE SERVICES NETWORK, INC. | MUNITH | 2002-04-22 | – | yes |
| 517-622 | Frontier | GRANDLEDGE | – | yes | yes |
| 517-623 | AT&T | DANSVILLE | – | yes | yes |
| 517-624 | Onvoy | DE WITT | 2006-05-24 | yes | yes |
| 517-625 | SHIAWASSEE TEL. CO. | PERRY | – | yes | yes |
| 517-626 | Frontier | GRANDLEDGE | – | yes | yes |
| 517-627 | Frontier | GRANDLEDGE | – | – | yes |
| 517-628 | Frontier | ONONDAGA | – | yes | yes |
| 517-629 | AT&T | ALBION | – | – | yes |
| 517-630 | AT&T | ALBION | – | yes | yes |
| 517-631 | INTERACTIVE SERVICES NETWORK, INC. | WEBBERVL | 2002-03-27 | – | yes |
| 517-633 | SKYE TELECOM LLC DBA SKYETEL | ADRIAN | 2021-09-03 | yes | yes |
| 517-634 | INTERACTIVE SERVICES NETWORK, INC. | FITCHBURG | 2002-04-22 | – | yes |
| 517-636 | AT&T | LANSING | 2001-11-28 | – | yes |
| 517-639 | Frontier | QUINCY | – | yes | yes |
| 517-641 | Frontier | BATH | – | yes | yes |
| 517-642 | 123.NET, LLC | MUNITH | 2002-08-12 | – | yes |
| 517-643 | Verizon | LANSING | 2001-11-27 | yes | yes |
| 517-645 | AT&T | POTTERVL | – | yes | yes |
| 517-646 | AT&T | DIMONDALE | – | yes | yes |
| 517-647 | AT&T | PORTLAND | – | yes | yes |
| 517-648 | Verizon | LANSING | – | – | yes |
| 517-649 | AT&T | MULLIKEN | – | yes | yes |
| 517-651 | Frontier | LAINGSBURG | – | yes | yes |
| 517-652 | T-Mobile | CHARLOTTE | 2001-12-27 | yes | yes |
| 517-653 | INTERACTIVE SERVICES NETWORK, INC. | BURLINGTON | 2002-04-22 | – | yes |
| 517-654 | INTERACTIVE SERVICES NETWORK, INC. | ALBION | 2001-11-13 | – | yes |
| 517-655 | Frontier | WILLIAMSTN | – | – | yes |
| 517-657 | Comcast | LANSING | – | yes | yes |
| 517-658 | INTERACTIVE SERVICES NETWORK, INC. | READING | 2002-03-27 | – | yes |
| 517-659 | INTERACTIVE SERVICES NETWORK, INC. | ADDISON | 2002-01-25 | – | yes |
| 517-662 | Verizon | ADRIAN | 2010-11-10 | yes | yes |
| 517-663 | AT&T | EATON RPD | – | – | yes |
| 517-664 | AT&T | LANSING | – | yes | yes |
| 517-666 | Onvoy | GRANDLEDGE | 2017-11-21 | yes | yes |
| 517-667 | Verizon | CHARLOTTE | 2002-03-29 | yes | yes |
| 517-668 | Frontier | DE WITT | – | yes | yes |
| 517-669 | Frontier | DE WITT | – | – | yes |
| 517-671 | INTERACTIVE SERVICES NETWORK, INC. | TEKONSHA | 2002-04-22 | – | yes |
| 517-672 | T-Mobile | HOWELL | 2002-06-26 | yes | yes |
| 517-673 | T-Mobile | ADRIAN | 2002-08-13 | yes | yes |
| 517-675 | SHIAWASSEE TEL. CO. | SHAFTSBURG | – | yes | yes |
| 517-676 | AT&T | MASON | – | – | yes |
| 517-677 | T-Mobile | COLDWATER | 2002-09-03 | yes | yes |
| 517-679 | 123.NET, LLC | LANSING | 2002-08-12 | – | yes |
| 517-680 | FIRST COMMUNICATIONS, LLC | ALBION | – | yes | yes |
| 517-682 | 123.NET, LLC | BLISSFIELD | 2001-11-01 | yes | yes |
| 517-684 | ACD TELECOM, INC. - MI | NAPOLEON | 2002-07-22 | yes | yes |
| 517-686 | Onvoy | ALBION | 2002-05-09 | yes | yes |
| 517-688 | Frontier | BUNDY HILL | – | – | yes |
| 517-689 | INTERACTIVE SERVICES NETWORK, INC. | HILLSDALE | 2001-11-13 | – | yes |
| 517-691 | ACD TELECOM, INC. - MI | SHAFTSBURG | 2002-06-18 | – | yes |
| 517-692 | ACD TELECOM, INC. - MI | SPRINGPORT | 2002-06-18 | yes | yes |
| 517-694 | AT&T | HOLT | – | – | yes |
| 517-695 | ACD TELECOM, INC. - MI | RANSOM | 2002-06-18 | yes | yes |
| 517-696 | ACD TELECOM, INC. - MI | PRATTVILLE | 2002-06-18 | yes | yes |
| 517-697 | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | PERRY | 2002-06-18 | yes | yes |
| 517-698 | ACD TELECOM, INC. - MI | NORTHADAMS | 2002-06-18 | yes | yes |
| 517-699 | AT&T | HOLT | – | yes | yes |
| 517-701 | 123.NET, LLC | CLINTON | 2005-12-07 | yes | yes |
| 517-702 | AT&T | LANSING | – | yes | yes |
| 517-703 | AT&T | LANSING | – | yes | yes |
| 517-705 | Lumen | BURLINGTON | 2001-11-16 | yes | yes |
| 517-706 | AT&T | LANSING | – | yes | yes |
| 517-708 | CYNERGYCOMM.NET, INC. - MI | LANSING | 2006-07-19 | yes | yes |
| 517-709 | Verizon | HOLT | 2006-03-02 | yes | yes |
| 517-710 | INTERACTIVE SERVICES NETWORK, INC. | STOCKBDG | 2002-04-22 | – | yes |
| 517-712 | T-Mobile | LANSING | 2001-06-27 | yes | yes |
| 517-714 | Lumen | BURLINGTON | 2002-08-19 | yes | yes |
| 517-715 | Onvoy | FOWLERVL | 2010-12-23 | yes | yes |
| 517-716 | INTERACTIVE SERVICES NETWORK, INC. | PARMA | 2002-03-27 | – | yes |
| 517-717 | INTERACTIVE SERVICES NETWORK, INC. | WILLIAMSTN | 2001-12-05 | – | yes |
| 517-719 | T-Mobile | LANSING | – | yes | yes |
| 517-721 | AT&T | LANSING | 2002-03-19 | yes | yes |
| 517-722 | Verizon | MASON | 2017-10-24 | yes | yes |
| 517-724 | INTERACTIVE SERVICES NETWORK, INC. | HOMER | 2002-03-27 | – | yes |
| 517-726 | AT&T | VERMONTVL | – | yes | yes |
| 517-727 | INTERACTIVE SERVICES NETWORK, INC. | CHARLOTTE | 2001-11-01 | – | yes |
| 517-728 | Lumen | TEKONSHA | 2001-12-27 | yes | yes |
| 517-730 | Vonage | LANSING | 2018-03-09 | yes | yes |
| 517-731 | Lumen | GRANDLEDGE | 2009-11-16 | yes | yes |
| 517-732 | 123.NET, LLC | PORTLAND | 2002-08-12 | yes | yes |
| 517-733 | TON80 COMMUNICATIONS, LLC | ADDISON | 2022-02-22 | yes | yes |
| 517-736 | 123.NET, LLC | COLDWATER | 2001-12-27 | yes | yes |
| 517-740 | Verizon | JACKSON | – | – | yes |
| 517-741 | Frontier | UNION CITY | – | yes | yes |
| 517-742 | AT&T | HOLT | 2008-09-02 | yes | yes |
| 517-743 | Lumen | PORTLAND | 2001-10-22 | yes | yes |
| 517-744 | SKYE TELECOM LLC DBA SKYETEL | LANSING | 2021-09-17 | yes | yes |
| 517-745 | Verizon | JACKSON | – | – | yes |
| 517-746 | TON80 COMMUNICATIONS, LLC | COLDWATER | 2022-02-28 | yes | yes |
| 517-748 | AT&T | JACKSON | – | yes | yes |
| 517-749 | T-Mobile | LANSING | – | yes | yes |
| 517-750 | AT&T | JACKSON | – | yes | yes |
| 517-753 | INTERACTIVE SERVICES NETWORK, INC. | COLDWATER | 2001-11-13 | – | yes |
| 517-755 | AT&T | LANSING | 2005-09-22 | yes | yes |
| 517-756 | Lumen | UNION CITY | 2002-08-19 | yes | yes |
| 517-758 | FRACTEL, LLC | HOLT | 2019-11-25 | yes | yes |
| 517-759 | Verizon | ADRIAN | 2002-09-18 | yes | yes |
| 517-760 | ACD TELECOM, INC. - MI | NASHVILLE | – | yes | yes |
| 517-762 | 123.NET, LLC | DANSVILLE | 2002-08-12 | – | yes |
| 517-763 | AT&T | LANSING | – | yes | yes |
| 517-764 | AT&T | JACKSON | – | yes | yes |
| 517-765 | Frontier | BURLINGTON | – | yes | yes |
| 517-766 | INTERACTIVE SERVICES NETWORK, INC. | ONONDAGA | 2001-12-05 | – | yes |
| 517-767 | Frontier | TEKONSHA | – | yes | yes |
| 517-768 | AT&T | JACKSON | – | – | yes |
| 517-769 | AT&T | JACKSON | – | yes | yes |
| 517-770 | COMMIO, LLC | LANSING | 2021-04-08 | yes | yes |
| 517-772 | INTERACTIVE SERVICES NETWORK, INC. | DANSVILLE | 2001-11-13 | – | yes |
| 517-774 | Lumen | COLDWTR LK | 2002-08-19 | yes | yes |
| 517-775 | AT&T | LANSING | 2002-01-30 | – | yes |
| 517-777 | Onvoy | HOLT | 2015-08-18 | yes | yes |
| 517-780 | AT&T | JACKSON | – | – | yes |
| 517-781 | Lumen | COLDWATER | 2002-08-19 | yes | yes |
| 517-782 | AT&T | JACKSON | – | – | yes |
| 517-783 | AT&T | JACKSON | – | – | yes |
| 517-784 | AT&T | JACKSON | – | – | yes |
| 517-785 | 123.NET, LLC | ONONDAGA | 2002-08-12 | – | yes |
| 517-786 | FRACTEL, LLC | CHARLOTTE | 2021-03-31 | yes | yes |
| 517-787 | AT&T | JACKSON | – | – | yes |
| 517-788 | AT&T | JACKSON | – | – | yes |
| 517-789 | AT&T | JACKSON | – | – | yes |
| 517-790 | ACD TELECOM, INC. - MI | MOSHERVL | 2002-06-18 | yes | yes |
| 517-792 | ACD TELECOM, INC. - MI | MONTGOMERY | 2002-06-18 | – | yes |
| 517-793 | ACD TELECOM, INC. - MI | LITCHFIELD | 2002-06-18 | yes | yes |
| 517-794 | American Messaging | LANSING | – | – | yes |
| 517-795 | T-Mobile | JACKSON | 2002-04-22 | yes | yes |
| 517-796 | AT&T | JACKSON | – | yes | yes |
| 517-797 | Windstream | HILLSDALE | 2001-10-22 | yes | yes |
| 517-798 | T-Mobile | HOWELL | 2010-08-06 | yes | yes |
| 517-800 | FRACTEL, LLC | JACKSON | 2019-09-12 | yes | yes |
| 517-802 | AT&T | LANSING | 2007-07-03 | yes | yes |
| 517-803 | Lumen | LANSING | 2002-05-14 | yes | yes |
| 517-804 | American Messaging | FOWLERVL | – | – | yes |
| 517-809 | INTERACTIVE SERVICES NETWORK, INC. | TECUMSEH | – | – | yes |
| 517-812 | T-Mobile | JACKSON | – | yes | yes |
| 517-813 | INTERACTIVE SERVICES NETWORK, INC. | BLISSFIELD | – | – | yes |
| 517-815 | Frontier | TECUMSEH | – | yes | yes |
| 517-816 | Onvoy | LANSING | – | yes | yes |
| 517-817 | AT&T | JACKSON | – | yes | yes |
| 517-819 | T-Mobile | LANSING | – | yes | yes |
| 517-825 | Verizon | HILLSDALE | – | – | yes |
| 517-826 | Lumen | JONESVILLE | 2002-05-14 | yes | yes |
| 517-827 | Windstream | LANSING | – | – | yes |
| 517-828 | 123.NET, LLC | HILLSDALE | 2002-08-12 | – | yes |
| 517-833 | Lumen | MASON | 2004-10-20 | yes | yes |
| 517-836 | CLEAR RATE COMMUNICATIONS, LLC | EATON RPD | 2011-12-07 | yes | yes |
| 517-837 | TON80 COMMUNICATIONS, LLC | TECUMSEH | 2022-01-11 | yes | yes |
| 517-840 | AT&T | JACKSON | – | – | yes |
| 517-841 | AT&T | JACKSON | – | – | yes |
| 517-842 | FRACTEL, LLC | GRASS LAKE | 2020-02-19 | yes | yes |
| 517-848 | INTERACTIVE SERVICES NETWORK, INC. | PORTLAND | 2001-11-13 | – | yes |
| 517-849 | AT&T | JONESVILLE | – | yes | yes |
| 517-851 | Frontier | STOCKBDG | – | yes | yes |
| 517-852 | AT&T | NASHVILLE | – | yes | yes |
| 517-853 | Lumen | LANSING | – | yes | yes |
| 517-855 | TERRA NOVA TELECOM INC. | LANSING | 2021-02-22 | yes | yes |
| 517-857 | SPRINGPORT TEL. CO. | SPRINGPORT | – | – | yes |
| 517-858 | Lumen | BRONSON | 2002-08-19 | yes | yes |
| 517-861 | T-Mobile | HOWELL | 2001-05-02 | yes | yes |
| 517-862 | T-Mobile | LANSING | 2001-11-09 | yes | yes |
| 517-867 | CLEAR RATE COMMUNICATIONS, LLC | JACKSON | 2016-04-12 | yes | yes |
| 517-868 | Lumen | DIMONDALE | – | yes | yes |
| 517-869 | Frontier | ALLEN | – | – | yes |
| 517-872 | INTERACTIVE SERVICES NETWORK, INC. | RIVES JCT | 2002-04-22 | – | yes |
| 517-873 | 123.NET, LLC | CHARLOTTE | 2002-08-12 | – | yes |
| 517-876 | Verizon | HOLT | 2005-07-13 | yes | yes |
| 517-877 | Verizon | LITCHFIELD | 2003-07-28 | yes | yes |
| 517-878 | Lumen | LESLIE | 2005-11-28 | yes | yes |
| 517-879 | Lumen | JACKSON | 2002-05-14 | yes | yes |
| 517-881 | Verizon | LANSING | – | – | yes |
| 517-882 | AT&T | LANSING | – | – | yes |
| 517-883 | FIRST COMMUNICATIONS, LLC | MASON | 2008-02-04 | yes | yes |
| 517-884 | AT&T | LANSING | – | – | yes |
| 517-885 | AT&T | LANSING | – | yes | yes |
| 517-886 | AT&T | LANSING | – | – | yes |
| 517-887 | AT&T | LANSING | – | – | yes |
| 517-888 | Onvoy | JACKSON | 2015-08-18 | yes | yes |
| 517-889 | Windstream | HOLT | 2006-01-12 | yes | yes |
| 517-890 | ACD TELECOM, INC. - MI | HANOVER | 2002-06-18 | yes | yes |
| 517-891 | ACD TELECOM, INC. - MI | FRONTIER | 2002-06-18 | yes | yes |
| 517-892 | AT&T | LANSING | 2023-06-29 | yes | yes |
| 517-893 | Twilio | LANSING | 2022-01-07 | yes | yes |
| 517-894 | T-Mobile | LANSING | 2008-03-03 | yes | yes |
| 517-895 | ACD TELECOM, INC. - MI | CONCORD | 2002-06-18 | yes | yes |
| 517-896 | Verizon | LANSING | – | – | yes |
| 517-897 | Verizon | LANSING | – | yes | yes |
| 517-898 | Verizon | LANSING | – | – | yes |
| 517-899 | Verizon | LANSING | – | – | yes |
| 517-900 | ACD TELECOM, INC. - MI | BUNDY HILL | 2002-06-18 | yes | yes |
| 517-901 | Charter | READING | 2007-10-02 | yes | yes |
| 517-902 | T-Mobile | ADRIAN | – | yes | yes |
| 517-903 | ACD TELECOM, INC. - MI | BATH | 2001-11-15 | yes | yes |
| 517-905 | INTERACTIVE SERVICES NETWORK, INC. | JACKSON | 2001-02-28 | – | yes |
| 517-906 | ACD TELECOM, INC. - MI | HOLT | 2002-01-21 | yes | yes |
| 517-907 | ACD TELECOM, INC. - MI | CLARKLAKE | 2001-11-15 | yes | yes |
| 517-908 | Lumen | LANSING | – | yes | yes |
| 517-909 | ACD TELECOM, INC. - MI | DANSVILLE | 2001-11-15 | yes | yes |
| 517-910 | Lumen | ONONDAGA | 2006-01-17 | yes | yes |
| 517-912 | ACD TELECOM, INC. - MI | DIMONDALE | 2001-11-15 | yes | yes |
| 517-913 | INTERACTIVE SERVICES NETWORK, INC. | LANSING | – | – | yes |
| 517-914 | T-Mobile | JACKSON | – | yes | yes |
| 517-915 | ACD TELECOM, INC. - MI | FOWLERVL | 2001-10-30 | yes | yes |
| 517-916 | INTERACTIVE SERVICES NETWORK, INC. | JONESVILLE | 2001-11-13 | – | yes |
| 517-917 | T-Mobile | JACKSON | – | yes | yes |
| 517-918 | T-Mobile | ADRIAN | – | yes | yes |
| 517-919 | AT&T | LAINGSBURG | – | yes | yes |
| 517-920 | INTERACTIVE SERVICES NETWORK, INC. | ADRIAN | 2006-02-01 | yes | yes |
| 517-921 | ACD TELECOM, INC. - MI | ADDISON | 2001-10-30 | yes | yes |
| 517-922 | ACD TELECOM, INC. - MI | EATON RPD | 2001-11-15 | – | yes |
| 517-923 | ACD TELECOM, INC. - MI | FITCHBURG | 2001-11-15 | yes | yes |
| 517-924 | Charter | COLDWATER | 2007-01-04 | yes | yes |
| 517-925 | ACD TELECOM, INC. - MI | GRANDLEDGE | 2001-11-15 | yes | yes |
| 517-926 | ACD TELECOM, INC. - MI | GRASS LAKE | 2001-11-15 | yes | yes |
| 517-927 | Verizon | LANSING | – | – | yes |
| 517-928 | Verizon | MASON | 2019-04-22 | yes | yes |
| 517-929 | ACD TELECOM, INC. - MI | HOMER | 2001-11-15 | yes | yes |
| 517-930 | Verizon | LANSING | – | yes | yes |
| 517-931 | Bandwidth | TEKONSHA | – | – | yes |
| 517-932 | ACD TELECOM, INC. - MI | ALLEN | 2002-06-18 | yes | yes |
| 517-933 | ACD TELECOM, INC. - MI | COLDWATER | – | – | yes |
| 517-936 | AT&T | JACKSON | – | yes | yes |
| 517-937 | T-Mobile | JACKSON | – | yes | yes |
| 517-938 | ACD TELECOM, INC. - MI | BROOKLYN | 2002-06-18 | yes | yes |
| 517-939 | Lumen | QUINCY | 2007-06-18 | yes | yes |
| 517-940 | AT&T | LANSING | 2014-07-25 | yes | yes |
| 517-941 | ACD TELECOM, INC. - MI | LAINGSBURG | 2001-11-15 | – | yes |
| 517-942 | ACD TELECOM, INC. - MI | LESLIE | 2001-11-15 | – | yes |
| 517-944 | T-Mobile | LANSING | – | yes | yes |
| 517-945 | Windstream | JACKSON | – | yes | yes |
| 517-946 | ACD TELECOM, INC. - MI | CAMBRIA | 2002-06-18 | yes | yes |
| 517-947 | INTERACTIVE SERVICES NETWORK, INC. | HOWELL | – | – | yes |
| 517-948 | ACD TELECOM, INC. - MI | MULLIKEN | 2001-11-15 | yes | yes |
| 517-949 | ACD TELECOM, INC. - MI | DE WITT | 2001-03-26 | – | yes |
| 517-953 | ACD TELECOM, INC. - MI | MUNITH | 2001-11-15 | – | yes |
| 517-955 | Onvoy | DANSVILLE | – | yes | yes |
| 517-957 | ACD TELECOM, INC. - MI | ONONDAGA | – | – | yes |
| 517-960 | AT&T | JACKSON | 2001-01-25 | yes | yes |
| 517-961 | ACD TELECOM, INC. - MI | ALBION | 2001-02-28 | – | yes |
| 517-962 | AT&T | JACKSON | 2007-08-07 | yes | yes |
| 517-963 | ACD TELECOM, INC. - MI | PARMA | 2001-11-15 | – | yes |
| 517-964 | ACD TELECOM, INC. - MI | HILLSDALE | 2001-10-30 | – | yes |
| 517-965 | ACD TELECOM, INC. - MI | POTTERVL | 2001-11-15 | – | yes |
| 517-966 | Verizon | DIMONDALE | 2006-02-09 | yes | yes |
| 517-968 | Verizon | DANSVILLE | 2006-01-27 | yes | yes |
| 517-969 | Windstream | MASON | 2006-01-12 | yes | yes |
| 517-970 | ACD TELECOM, INC. - MI | READING | 2001-11-15 | – | yes |
| 517-972 | ACD TELECOM, INC. - MI | BELL OAK | 2002-06-18 | yes | yes |
| 517-973 | American Messaging | CHARLOTTE | – | – | yes |
| 517-974 | AT&T | LANSING | – | – | yes |
| 517-975 | Windstream | LANSING | 2007-10-08 | yes | yes |
| 517-977 | Comcast | LANSING | 2006-08-16 | yes | yes |
| 517-978 | ACD TELECOM, INC. - MI | MASON | 2002-01-21 | – | yes |
| 517-979 | ACD TELECOM, INC. - MI | RIVES JCT | 2001-11-15 | – | yes |
| 517-980 | T-Mobile | LANSING | 2001-02-28 | yes | yes |
| 517-981 | ACD TELECOM, INC. - MI | VERMONTVL | 2001-11-15 | – | yes |
| 517-983 | Verizon | CHARLOTTE | 2004-02-24 | yes | yes |
| 517-984 | ACD TELECOM, INC. - MI | WEBBERVL | 2001-11-15 | yes | yes |
| 517-985 | ACD TELECOM, INC. - MI | STOCKBDG | 2001-05-02 | yes | yes |
| 517-990 | AT&T | JACKSON | – | yes | yes |
| 517-991 | ACD TELECOM, INC. - MI | CAMDEN | 2002-06-18 | yes | yes |
| 517-992 | 123.NET, LLC | WILLIAMSTN | 2003-02-21 | yes | yes |
| 517-993 | AT&T | LANSING | – | yes | yes |
| 517-994 | ACD TELECOM, INC. - MI | PORTLAND | – | yes | yes |
| 517-995 | ACD TELECOM, INC. - MI | JONESVILLE | 2001-10-01 | yes | yes |
| 517-996 | ACD TELECOM, INC. - MI | WILLIAMSTN | 2001-11-15 | yes | yes |
| 517-997 | ACD TELECOM, INC. - MI | CHARLOTTE | – | yes | yes |
| 517-998 | ACD TELECOM, INC. - MI | JACKSON | – | – | yes |
| 517-999 | ACD TELECOM, INC. - MI | LANSING | – | – | yes |
Frequently asked
How many prefixes does area code 517 have?
616 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 6,160 thousand-number ranges across 78 rate centers.
What do the first three digits after 517 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 517 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 517 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 411 of 517'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