Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
FORT WORTH prefixes in area code 817
NANPA records 192 assigned NXX blocks to rate center FORT WORTH in area code 817, 24.6% of the 781 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. 22 holders hold those blocks, the largest being SOUTHWESTERN BELL (131), LEVEL 3 COMMUNICATIONS, LLC - TX (10), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (8). The earliest assignment on record here is 2001-04-09 and the most recent 2025-05-13. 108 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 code 682 – overlay codes cover the same geography, so a rate center is served by all of them.
192 assigned blocks – 24.6% of 817
22 holders of record
108 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 817-204 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | yes | yes |
| 817-205 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | yes | yes |
| 817-207 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-208 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | no | yes |
| 817-210 | AT&T AT&T - LOCAL | – | yes | yes |
| 817-212 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-214 | Onvoy ONVOY, LLC - TX | 2023-05-22 | yes | yes |
| 817-215 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-222 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-230 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-231 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-232 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-234 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-236 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-237 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-238 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-244 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-245 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-246 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-248 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-249 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-250 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-252 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-254 | Charter ONVOY SPECTRUM, LLC | 2023-07-05 | yes | yes |
| 817-255 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-256 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 817-257 | Windstream PAETEC ITEL, LLC | – | no | yes |
| 817-258 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-259 | MATRIX TELECOM, LLC. S/I/I TNCI - TX | – | no | yes |
| 817-263 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-278 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-288 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 817-289 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | no | yes |
| 817-292 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-293 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-294 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-295 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-297 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-298 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-302 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 817-306 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-314 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-315 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-317 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-321 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-332 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-333 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-334 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-335 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-336 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-338 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-339 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-344 | AT&T AT&T - LOCAL | – | yes | yes |
| 817-346 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-347 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-348 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-349 | Charter CHARTER IP ENABLED SERVICES, LLC | – | yes | yes |
| 817-350 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-352 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-353 | AT&T AT&T - LOCAL | – | yes | yes |
| 817-361 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-363 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2010-05-11 | yes | yes |
| 817-365 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | no | yes |
| 817-367 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-370 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-377 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-378 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-384 | Charter ONVOY SPECTRUM, LLC | 2022-08-12 | yes | yes |
| 817-386 | Charter CHARTER IP ENABLED SERVICES, LLC | – | yes | yes |
| 817-387 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-390 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-392 | AT&T SOUTHWESTERN BELL | 2001-04-09 | no | yes |
| 817-413 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-415 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-420 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-423 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-426 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-433 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-439 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-441 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-443 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-447 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-448 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-450 | Dish BOOST SUBSCRIBERCO L.L.C. | 2025-05-13 | yes | yes |
| 817-463 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | no | yes |
| 817-484 | PATHWAY COM-TEL, INC. - TX | – | yes | yes |
| 817-489 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-495 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-502 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-509 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 817-515 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-529 | Onvoy ONVOY, LLC - TX | – | no | yes |
| 817-531 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-534 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-535 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-536 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-546 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 817-547 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-551 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-560 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-566 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 817-568 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-569 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-570 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-585 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-593 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-603 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 2004-12-13 | yes | yes |
| 817-607 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-615 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-624 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-625 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-626 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-632 | Onvoy ONVOY, LLC - TX | – | no | yes |
| 817-639 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | no | yes |
| 817-644 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | no | yes |
| 817-655 | AT&T SOUTHWESTERN BELL | 2002-05-02 | yes | yes |
| 817-660 | COMMIO, LLC | 2023-12-20 | yes | yes |
| 817-665 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 817-696 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-698 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-702 | AT&T SOUTHWESTERN BELL | 2006-10-04 | yes | yes |
| 817-708 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 817-710 | WESTEL, INC. - TX | 2006-07-11 | yes | yes |
| 817-717 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-720 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 817-730 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-731 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-732 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-735 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-737 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-738 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-740 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-744 | Charter CHARTER IP ENABLED SERVICES, LLC | – | yes | yes |
| 817-750 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | – | yes | yes |
| 817-759 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-762 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-763 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-764 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-768 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-769 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-773 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2003-03-04 | yes | yes |
| 817-777 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-782 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-787 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-806 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 817-810 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-814 | AT&T SOUTHWESTERN BELL | 2005-11-22 | yes | yes |
| 817-815 | AT&T SOUTHWESTERN BELL | 2005-11-22 | yes | yes |
| 817-817 | USFON, INC. - TX | 2023-01-06 | yes | yes |
| 817-820 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-831 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-834 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-838 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-840 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 817-841 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-844 | EXIANT COMMUNICATIONS LLC | – | no | yes |
| 817-847 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-850 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-852 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-862 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-867 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-869 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | no | yes |
| 817-870 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-871 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-872 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | no | yes |
| 817-877 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-878 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-882 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-884 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-885 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-886 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-887 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 817-900 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-902 | T-Mobile METROPCS, INC. | 2006-04-11 | yes | yes |
| 817-916 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 817-920 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-921 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-922 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-923 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-924 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-926 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-927 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-928 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-935 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 817-945 | Onvoy ONVOY, LLC - TX | 2006-01-17 | yes | yes |
| 817-953 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-971 | Charter ONVOY SPECTRUM, LLC | 2024-06-10 | yes | yes |
| 817-973 | Charter ONVOY SPECTRUM, LLC | 2024-03-12 | yes | yes |
| 817-978 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 817-984 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 817-986 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 817-989 | AT&T SOUTHWESTERN BELL | – | yes | yes |
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 |
|---|---|---|---|
| SOUTHWESTERN BELL | AT&T | 131 | 68.2% |
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 10 | 5.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 8 | 4.2% |
| LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | Lumen | 7 | 3.6% |
| GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | 6 | 3.1% |
| ONVOY, LLC - TX | Onvoy | 5 | 2.6% |
| ONVOY SPECTRUM, LLC | Charter | 4 | 2.1% |
| AT&T - LOCAL | AT&T | 3 | 1.6% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 3 | 1.6% |
| PAETEC ITEL, LLC | Windstream | 2 | 1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TX | AT&T | 2 | 1% |
| MATRIX TELECOM, LLC. S/I/I TNCI - TX | – | 1 | 0.5% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 0.5% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 1 | 0.5% |
| PATHWAY COM-TEL, INC. - TX | – | 1 | 0.5% |
| COMMIO, LLC | – | 1 | 0.5% |
| WESTEL, INC. - TX | – | 1 | 0.5% |
| BANDWIDTH.COM CLEC, LLC - TX | Bandwidth | 1 | 0.5% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 1 | 0.5% |
| USFON, INC. - TX | – | 1 | 0.5% |
| EXIANT COMMUNICATIONS LLC | – | 1 | 0.5% |
| METROPCS, INC. | T-Mobile | 1 | 0.5% |
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 FORT WORTH in area code 817?
192 blocks: 204, 205, 207, 208, 210, 212, 214, 215, 222, 230, 231, 232 and 180 more, all listed in the table above.
Which carriers have numbers in FORT WORTH?
SOUTHWESTERN BELL (131 blocks), LEVEL 3 COMMUNICATIONS, LLC - TX (10 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (8 blocks), LEVEL 3 OF TELECOM OF TEXAS, LLC - TX (7 blocks), GRANDE COMMUNICATIONS NETWORKS, INC. - TX (6 blocks), ONVOY, LLC - TX (5 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is FORT WORTH 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.