Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
AUSTIN prefixes in area code 737
NANPA records 155 assigned NXX blocks to rate center AUSTIN in area code 737, 46.5% of the 333 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 42 holders hold those blocks, the largest being ONVOY, LLC - TX (32), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (19), NEW CINGULAR WIRELESS PCS, LLC - IL (19). The earliest assignment on record here is 2013-03-01 and the most recent 2026-10-20. 155 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 507, 512, 775, 812 – overlay codes cover the same geography, so a rate center is served by all of them.
155 assigned blocks – 46.5% of 737
42 holders of record
155 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 737-202 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | 2015-08-26 | yes | yes |
| 737-203 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 2015-09-22 | yes | yes |
| 737-204 | Onvoy ONVOY, LLC - TX | 2015-11-18 | yes | yes |
| 737-205 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 737-207 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2015-11-18 | yes | yes |
| 737-208 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2016-01-11 | yes | yes |
| 737-209 | Charter TWC IP ENABLED SERVICES, LLC | 2016-04-26 | yes | yes |
| 737-210 | Onvoy ONVOY, LLC - TX | 2013-10-23 | yes | yes |
| 737-212 | Charter TWC IP ENABLED SERVICES, LLC | 2015-11-18 | yes | yes |
| 737-217 | T-Mobile T-MOBILE USA, INC. | 2017-03-29 | yes | yes |
| 737-218 | Peerless PEERLESS NETWORK OF TEXAS, LLC - TX | – | yes | yes |
| 737-219 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2017-04-07 | yes | yes |
| 737-220 | Vonage VONAGE AMERICA LLC | 2017-07-06 | yes | yes |
| 737-222 | FOREMOST TELECOMMUNICATIONS CORPORATION - TX | 2013-08-13 | yes | yes |
| 737-223 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2017-02-02 | yes | yes |
| 737-224 | AUSTIN BESTLINE COMPANY | 2017-10-27 | yes | yes |
| 737-226 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2015-07-01 | yes | yes |
| 737-228 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2017-09-20 | yes | yes |
| 737-229 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2017-12-11 | yes | yes |
| 737-230 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2018-01-12 | yes | yes |
| 737-231 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2018-03-23 | yes | yes |
| 737-235 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2018-05-04 | yes | yes |
| 737-236 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2018-06-21 | yes | yes |
| 737-237 | Onvoy ONVOY, LLC - TX | 2018-02-06 | yes | yes |
| 737-239 | VoIP Innovations VOIP INNOVATIONS, LLC | 2018-08-14 | yes | yes |
| 737-241 | Onvoy ONVOY, LLC - TX | 2017-08-16 | yes | yes |
| 737-242 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | – | yes | yes |
| 737-243 | Peerless PEERLESS NETWORK OF TEXAS, LLC - TX | – | yes | yes |
| 737-246 | AIRESPRING, INC. | 2018-09-27 | yes | yes |
| 737-247 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 737-249 | IP GLOBAL NETWORKS - TX | 2018-10-02 | yes | yes |
| 737-254 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2025-05-06 | yes | yes |
| 737-255 | EXIANT COMMUNICATIONS LLC | 2019-03-01 | yes | yes |
| 737-256 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2019-03-04 | yes | yes |
| 737-261 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2019-10-08 | yes | yes |
| 737-262 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2019-10-16 | yes | yes |
| 737-263 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2019-12-13 | yes | yes |
| 737-267 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2020-02-19 | yes | yes |
| 737-268 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2020-06-10 | yes | yes |
| 737-269 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2020-06-18 | yes | yes |
| 737-270 | NUSO, LLC | 2020-06-26 | yes | yes |
| 737-272 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2020-08-06 | yes | yes |
| 737-273 | Onvoy ONVOY, LLC - TX | 2019-12-23 | yes | yes |
| 737-277 | Onvoy ONVOY, LLC - TX | 2020-08-12 | yes | yes |
| 737-279 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2020-09-24 | yes | yes |
| 737-280 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2020-09-28 | yes | yes |
| 737-281 | IP HORIZON LLC | 2020-09-28 | yes | yes |
| 737-285 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2021-01-11 | yes | yes |
| 737-288 | FRACTEL, LLC | 2021-05-10 | yes | yes |
| 737-289 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2021-06-18 | yes | yes |
| 737-291 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2021-08-17 | yes | yes |
| 737-292 | Onvoy ONVOY, LLC - TX | 2021-06-23 | yes | yes |
| 737-295 | Onvoy ONVOY, LLC - TX | 2021-08-24 | yes | yes |
| 737-296 | T-Mobile T-MOBILE USA, INC. | 2021-08-24 | yes | yes |
| 737-297 | T-Mobile T-MOBILE USA, INC. | 2021-08-25 | yes | yes |
| 737-300 | Onvoy ONVOY, LLC - TX | 2015-03-25 | yes | yes |
| 737-301 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2021-09-14 | yes | yes |
| 737-304 | Charter ONVOY SPECTRUM, LLC | – | yes | yes |
| 737-308 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2021-10-22 | yes | yes |
| 737-309 | CALLWORKS CORPORATION | 2021-11-01 | yes | yes |
| 737-313 | Dish BOOST SUBSCRIBERCO L.L.C. | 2021-12-29 | yes | yes |
| 737-319 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2022-02-04 | yes | yes |
| 737-320 | Windstream PAETEC ITEL, LLC | 2022-02-28 | yes | yes |
| 737-325 | Onvoy ONVOY, LLC - TX | 2023-09-13 | yes | yes |
| 737-326 | T-Mobile T-MOBILE USA, INC. | 2022-06-28 | yes | yes |
| 737-328 | T-Mobile T-MOBILE USA, INC. | 2022-06-28 | yes | yes |
| 737-329 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2022-07-28 | yes | yes |
| 737-330 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2022-08-16 | yes | yes |
| 737-333 | FOREMOST TELECOMMUNICATIONS CORPORATION - TX | 2013-03-01 | yes | yes |
| 737-334 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2022-09-23 | yes | yes |
| 737-336 | FRACTEL, LLC | 2020-08-18 | yes | yes |
| 737-341 | T-Mobile T-MOBILE USA, INC. | 2022-10-06 | yes | yes |
| 737-342 | T-Mobile T-MOBILE USA, INC. | 2022-10-06 | yes | yes |
| 737-343 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2022-10-12 | yes | yes |
| 737-346 | AUSTIN BESTLINE COMPANY | 2013-07-23 | yes | yes |
| 737-351 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2022-11-15 | yes | yes |
| 737-354 | NUSO, LLC | 2023-02-16 | yes | yes |
| 737-358 | Comcast COMCAST IP PHONE, LLC | 2023-02-28 | yes | yes |
| 737-359 | HADLO TECHNOLOGIES, LLC | 2023-05-05 | yes | yes |
| 737-363 | T-Mobile T-MOBILE USA, INC. | 2023-11-07 | yes | yes |
| 737-367 | Onvoy ONVOY, LLC - TX | 2023-12-12 | yes | yes |
| 737-368 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2023-12-12 | yes | yes |
| 737-370 | COMMIO, LLC | 2023-12-20 | yes | yes |
| 737-376 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2024-02-15 | yes | yes |
| 737-377 | FRACTEL, LLC | 2020-06-18 | yes | yes |
| 737-381 | Onvoy ONVOY, LLC - TX | 2024-03-18 | yes | yes |
| 737-382 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2024-03-21 | yes | yes |
| 737-384 | Dish BOOST SUBSCRIBERCO L.L.C. | 2024-04-03 | yes | yes |
| 737-389 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2024-05-23 | yes | yes |
| 737-393 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2024-06-21 | yes | yes |
| 737-394 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | 2024-07-10 | yes | yes |
| 737-395 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2024-08-28 | yes | yes |
| 737-396 | FIVE9, INC. | 2024-08-30 | yes | yes |
| 737-397 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2024-09-24 | yes | yes |
| 737-398 | T-Mobile T-MOBILE USA, INC. | 2024-10-02 | yes | yes |
| 737-399 | T-Mobile T-MOBILE USA, INC. | 2024-10-14 | yes | yes |
| 737-400 | Onvoy ONVOY, LLC - TX | 2015-10-13 | yes | yes |
| 737-401 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2016-10-18 | yes | yes |
| 737-402 | Telnyx TELNYX LLC | 2016-12-02 | yes | yes |
| 737-406 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2024-12-12 | yes | yes |
| 737-408 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2025-01-06 | yes | yes |
| 737-409 | Onvoy ONVOY, LLC - TX | 2025-01-09 | yes | yes |
| 737-410 | Charter ONVOY SPECTRUM, LLC | 2025-01-29 | yes | yes |
| 737-412 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2025-02-10 | yes | yes |
| 737-415 | IP HORIZON LLC | 2025-02-26 | yes | yes |
| 737-418 | Onvoy ONVOY, LLC - TX | 2025-04-08 | yes | yes |
| 737-419 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2025-05-02 | yes | yes |
| 737-420 | COMMIO, LLC | 2021-11-03 | yes | yes |
| 737-423 | WAVENATION, LLC | 2025-07-18 | yes | yes |
| 737-428 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2025-10-29 | yes | yes |
| 737-429 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2025-11-13 | yes | yes |
| 737-430 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2025-11-20 | yes | yes |
| 737-431 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2025-12-03 | yes | yes |
| 737-434 | Onvoy ONVOY, LLC - TX | 2026-02-18 | yes | yes |
| 737-435 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2026-05-28 | yes | yes |
| 737-438 | AHOI LLC | 2026-03-26 | yes | yes |
| 737-439 | Onvoy ONVOY, LLC - TX | 2026-06-30 | yes | no |
| 737-440 | T-Mobile T-MOBILE USA, INC. | 2026-06-16 | yes | no |
| 737-442 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2026-06-02 | yes | yes |
| 737-443 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 737-446 | Onvoy ONVOY, LLC - TX | 2026-10-20 | yes | no |
| 737-455 | T-Mobile T-MOBILE USA, INC. | 2026-06-16 | yes | no |
| 737-465 | FRACTEL, LLC | 2019-05-21 | yes | yes |
| 737-471 | AT&T SOUTHWESTERN BELL | 2018-03-22 | yes | yes |
| 737-484 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 2015-07-07 | yes | yes |
| 737-497 | Onvoy ONVOY, LLC - TX | 2023-01-09 | yes | yes |
| 737-529 | Onvoy ONVOY, LLC - TX | 2015-02-02 | yes | yes |
| 737-587 | FRACTEL, LLC | 2021-12-30 | yes | yes |
| 737-600 | Onvoy ONVOY, LLC - TX | 2015-04-14 | yes | yes |
| 737-610 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 737-615 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 737-701 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2015-09-17 | yes | yes |
| 737-703 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 737-704 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 2014-04-10 | yes | yes |
| 737-707 | SKYE TELECOM LLC DBA SKYETEL | 2021-09-07 | yes | yes |
| 737-708 | T-Mobile METROPCS, INC. | – | yes | yes |
| 737-710 | Charter ONVOY SPECTRUM, LLC | 2019-10-09 | yes | yes |
| 737-717 | Onvoy ONVOY, LLC - TX | 2016-01-18 | yes | yes |
| 737-742 | TON80 COMMUNICATIONS, LLC | 2021-04-29 | yes | yes |
| 737-781 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2016-03-07 | yes | yes |
| 737-787 | HD CARRIER LLC | 2020-02-28 | yes | yes |
| 737-800 | Onvoy ONVOY, LLC - TX | 2015-01-28 | yes | yes |
| 737-802 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 2015-08-19 | yes | yes |
| 737-825 | TON80 COMMUNICATIONS, LLC | 2020-05-08 | yes | yes |
| 737-867 | COMMIO, LLC | 2016-11-02 | yes | yes |
| 737-880 | 8x8 8X8, INC. | 2026-09-16 | yes | no |
| 737-895 | Twilio TWILIO INTERNATIONAL, INC. | 2020-08-05 | yes | yes |
| 737-900 | TERRA NOVA TELECOM INC. | 2019-03-19 | yes | yes |
| 737-910 | Onvoy ONVOY, LLC - TX | 2020-12-08 | yes | yes |
| 737-931 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2016-10-27 | yes | yes |
| 737-932 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 737-975 | Onvoy ONVOY, LLC - TX | 2024-10-14 | yes | yes |
| 737-977 | FRACTEL, LLC | 2020-11-27 | yes | yes |
| 737-990 | INVOXIO INCORPORATED | 2018-05-22 | yes | yes |
| 737-998 | Onvoy ONVOY, LLC - TX | 2026-08-06 | yes | no |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| ONVOY, LLC - TX | Onvoy | 32 | 20.6% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | Verizon | 19 | 12.3% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 19 | 12.3% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TX | AT&T | 12 | 7.7% |
| T-MOBILE USA, INC. | T-Mobile | 12 | 7.7% |
| BANDWIDTH.COM CLEC, LLC - TX | Bandwidth | 6 | 3.9% |
| FRACTEL, LLC | – | 6 | 3.9% |
| ONVOY SPECTRUM, LLC | Charter | 3 | 1.9% |
| COMMIO, LLC | – | 3 | 1.9% |
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 2 | 1.3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | Verizon | 2 | 1.3% |
| TWC IP ENABLED SERVICES, LLC | Charter | 2 | 1.3% |
| PEERLESS NETWORK OF TEXAS, LLC - TX | Peerless | 2 | 1.3% |
| FOREMOST TELECOMMUNICATIONS CORPORATION - TX | – | 2 | 1.3% |
| AUSTIN BESTLINE COMPANY | – | 2 | 1.3% |
| NUSO, LLC | – | 2 | 1.3% |
| IP HORIZON LLC | – | 2 | 1.3% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 2 | 1.3% |
| TON80 COMMUNICATIONS, LLC | – | 2 | 1.3% |
| VONAGE AMERICA LLC | Vonage | 1 | 0.6% |
| VOIP INNOVATIONS, LLC | VoIP Innovations | 1 | 0.6% |
| AIRESPRING, INC. | – | 1 | 0.6% |
| IP GLOBAL NETWORKS - TX | – | 1 | 0.6% |
| EXIANT COMMUNICATIONS LLC | – | 1 | 0.6% |
| CALLWORKS CORPORATION | – | 1 | 0.6% |
| PAETEC ITEL, LLC | Windstream | 1 | 0.6% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 0.6% |
| HADLO TECHNOLOGIES, LLC | – | 1 | 0.6% |
| FIVE9, INC. | – | 1 | 0.6% |
| TELNYX LLC | Telnyx | 1 | 0.6% |
| WAVENATION, LLC | – | 1 | 0.6% |
| AHOI LLC | – | 1 | 0.6% |
| SOUTHWESTERN BELL | AT&T | 1 | 0.6% |
| GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | 1 | 0.6% |
| SKYE TELECOM LLC DBA SKYETEL | – | 1 | 0.6% |
| METROPCS, INC. | T-Mobile | 1 | 0.6% |
| HD CARRIER LLC | – | 1 | 0.6% |
| 8X8, INC. | 8x8 | 1 | 0.6% |
| TWILIO INTERNATIONAL, INC. | Twilio | 1 | 0.6% |
| TERRA NOVA TELECOM INC. | – | 1 | 0.6% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 0.6% |
| INVOXIO INCORPORATED | – | 1 | 0.6% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to AUSTIN in area code 737?
155 blocks: 202, 203, 204, 205, 207, 208, 209, 210, 212, 217, 218, 219 and 143 more, all listed in the table above.
Which carriers have numbers in AUSTIN?
ONVOY, LLC - TX (32 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (19 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (19 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (12 blocks), T-MOBILE USA, INC. (12 blocks), BANDWIDTH.COM CLEC, LLC - TX (6 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is AUSTIN a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.