Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
DALLAS prefixes in area code 972
NANPA records 247 assigned NXX blocks to rate center DALLAS in area code 972, 31.5% of the 785 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. 17 holders hold those blocks, the largest being SOUTHWESTERN BELL (193), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (24), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (7). The earliest assignment on record here is 2001-04-24 and the most recent 2025-12-29. 142 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 214, 469, 503, 570 – overlay codes cover the same geography, so a rate center is served by all of them.
247 assigned blocks – 31.5% of 972
17 holders of record
142 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 972-201 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-203 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-204 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-216 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-218 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-220 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | yes | yes |
| 972-222 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-224 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-225 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-226 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-227 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-228 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-231 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-232 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-233 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-234 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-235 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-238 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-239 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-241 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-243 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-246 | AT&T AT&T - LOCAL | – | yes | yes |
| 972-247 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-248 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-250 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-267 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-270 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-275 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-277 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-279 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-280 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-283 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-284 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-285 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-286 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-288 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-289 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-290 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-296 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-298 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-301 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-308 | AT&T AT&T ENTERPRISES, LLC | – | yes | yes |
| 972-328 | E. RITTER COMMUNICATIONS, LLC | 2025-12-29 | yes | yes |
| 972-329 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-331 | Onvoy ONVOY, LLC - TX | – | no | yes |
| 972-338 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-340 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-341 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-344 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-348 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-349 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-354 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | no | yes |
| 972-361 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-362 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-364 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-367 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-368 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-371 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-373 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-376 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-380 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-381 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-383 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-385 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-386 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-387 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-388 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-391 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-392 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-401 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-402 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-404 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-405 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-406 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-407 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-409 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-419 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-421 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 972-432 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-437 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-443 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-444 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-447 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-448 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-450 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-454 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-455 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-458 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-470 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-479 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-480 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-481 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-484 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-488 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-490 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-497 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-498 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-499 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 972-501 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-502 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-503 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-506 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-528 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-532 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-546 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 972-556 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-557 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-559 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-560 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-566 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-572 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-581 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-584 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-587 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 972-588 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-590 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 972-591 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-598 | Charter TWC IP ENABLED SERVICES, LLC | 2012-12-13 | yes | yes |
| 972-613 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-616 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 972-619 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 972-620 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-628 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-629 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 972-630 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-638 | AT&T SOUTHWESTERN BELL | 2001-04-24 | yes | yes |
| 972-643 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-644 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-656 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-661 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-663 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-664 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-669 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-671 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-674 | Bandwidth BANDWIDTH.COM CLEC, LLC - TX | – | yes | yes |
| 972-676 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-677 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 972-680 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-681 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-682 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-684 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-685 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-686 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-687 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-690 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-692 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-698 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-699 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-701 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-702 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-705 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-706 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-707 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-708 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-709 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-713 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-715 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-716 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-720 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-725 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-726 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-728 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-729 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-732 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-733 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-735 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-738 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-739 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-744 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-749 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-755 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 972-759 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-761 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-763 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-764 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 972-766 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-770 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-773 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-774 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-776 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-777 | USFON, INC. - TX | 2019-11-19 | yes | yes |
| 972-778 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-780 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-783 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-788 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-789 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-792 | AT&T SOUTHWESTERN BELL | 2001-04-24 | yes | yes |
| 972-794 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-803 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-807 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-808 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-813 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-818 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-828 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-830 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-831 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-844 | EXIANT COMMUNICATIONS LLC | – | no | yes |
| 972-847 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | no | yes |
| 972-850 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 972-851 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-852 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-855 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-856 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-857 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-858 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-860 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-861 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-863 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-865 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | yes | yes |
| 972-866 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-868 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-869 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-882 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-883 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-884 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-885 | NUSO, LLC | 2012-10-18 | yes | yes |
| 972-888 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-889 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-892 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 972-907 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-910 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-913 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-917 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-918 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-919 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-925 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 972-927 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-930 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-931 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-934 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-936 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2018-02-22 | yes | yes |
| 972-940 | AT&T SOUTHWESTERN BELL | 2017-01-24 | yes | yes |
| 972-942 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 2018-03-26 | yes | yes |
| 972-944 | EON TELECOM, INC. | 2023-12-15 | yes | yes |
| 972-952 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-960 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-968 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-969 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-972 | Onvoy ONVOY, LLC - TX | 2017-10-19 | yes | yes |
| 972-980 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-982 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-991 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-993 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | no | yes |
| 972-994 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-995 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 972-996 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 972-997 | 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 | 193 | 78.1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 24 | 9.7% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TX | AT&T | 7 | 2.8% |
| GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | 3 | 1.2% |
| ONVOY, LLC - TX | Onvoy | 3 | 1.2% |
| LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | Lumen | 3 | 1.2% |
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 3 | 1.2% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 2 | 0.8% |
| AT&T - LOCAL | AT&T | 1 | 0.4% |
| AT&T ENTERPRISES, LLC | AT&T | 1 | 0.4% |
| E. RITTER COMMUNICATIONS, LLC | – | 1 | 0.4% |
| TWC IP ENABLED SERVICES, LLC | Charter | 1 | 0.4% |
| BANDWIDTH.COM CLEC, LLC - TX | Bandwidth | 1 | 0.4% |
| USFON, INC. - TX | – | 1 | 0.4% |
| EXIANT COMMUNICATIONS LLC | – | 1 | 0.4% |
| NUSO, LLC | – | 1 | 0.4% |
| EON TELECOM, INC. | – | 1 | 0.4% |
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 DALLAS in area code 972?
247 blocks: 201, 203, 204, 216, 218, 220, 222, 224, 225, 226, 227, 228 and 235 more, all listed in the table above.
Which carriers have numbers in DALLAS?
SOUTHWESTERN BELL (193 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (24 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (7 blocks), GRANDE COMMUNICATIONS NETWORKS, INC. - TX (3 blocks), ONVOY, LLC - TX (3 blocks), LEVEL 3 OF TELECOM OF TEXAS, LLC - TX (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is DALLAS 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.