Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
HSTNSUBURB prefixes in area code 281
NANPA records 131 assigned NXX blocks to rate center HSTNSUBURB in area code 281, 16.7% of the 786 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. 14 holders hold those blocks, the largest being SOUTHWESTERN BELL (86), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX (11), METROPCS, INC. (7). The earliest assignment on record here is 2001-12-27 and the most recent 2024-11-20. 80 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 346, 713, 832 – overlay codes cover the same geography, so a rate center is served by all of them.
131 assigned blocks – 16.7% of 281
14 holders of record
80 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 281-219 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-227 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-249 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 281-258 | AT&T SOUTHWESTERN BELL | 2002-07-09 | yes | yes |
| 281-260 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-272 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-281 | USFON, INC. - TX | 2023-01-06 | yes | yes |
| 281-293 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-310 | AT&T AT&T - LOCAL | – | yes | yes |
| 281-330 | T-Mobile METROPCS, INC. | 2002-01-24 | yes | yes |
| 281-349 | Spok SPOK, INC. | – | no | yes |
| 281-366 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | no | yes |
| 281-368 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-372 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-405 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-406 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 281-412 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-416 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-436 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-437 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-438 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-442 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-445 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-447 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-448 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-449 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-454 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-458 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-459 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-464 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-473 | Onvoy ONVOY, LLC - TX | 2024-11-20 | yes | yes |
| 281-481 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-484 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-485 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-487 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-493 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-495 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-496 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-497 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-498 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-504 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-506 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 281-509 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-512 | T-Mobile METROPCS, INC. | 2012-10-02 | yes | yes |
| 281-529 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-530 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-531 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-544 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-552 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-556 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-558 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-560 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-561 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-564 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-568 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-575 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-582 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | no | yes |
| 281-584 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-588 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-589 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-590 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-591 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-594 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-596 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-597 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-598 | Onvoy ONVOY, LLC - TX | – | no | yes |
| 281-606 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 281-617 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 281-619 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-642 | T-Mobile AERIAL COMMUNICATIONS, INC. | 2002-10-18 | yes | yes |
| 281-649 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-668 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-670 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-674 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-677 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-679 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-721 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-741 | Comcast COMCAST IP PHONE, LLC | 2006-11-21 | yes | yes |
| 281-749 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-752 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-754 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-759 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-760 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-776 | AT&T SOUTHWESTERN BELL | 2001-12-27 | no | yes |
| 281-805 | Onvoy ONVOY, LLC - TX | 2022-04-28 | yes | yes |
| 281-809 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-810 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-818 | T-Mobile AERIAL COMMUNICATIONS, INC. | – | yes | yes |
| 281-820 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-830 | T-Mobile METROPCS, INC. | – | yes | yes |
| 281-831 | T-Mobile AERIAL COMMUNICATIONS, INC. | – | yes | yes |
| 281-835 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-847 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-848 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 281-850 | T-Mobile METROPCS, INC. | – | yes | yes |
| 281-854 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 281-870 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-878 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-879 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-886 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-892 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-896 | T-Mobile METROPCS, INC. | 2007-08-03 | yes | yes |
| 281-899 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-901 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | – | yes | yes |
| 281-902 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | yes | yes |
| 281-912 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 2006-01-05 | yes | yes |
| 281-920 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-921 | Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | – | no | yes |
| 281-922 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-924 | T-Mobile METROPCS, INC. | – | yes | yes |
| 281-925 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX | – | yes | yes |
| 281-929 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-931 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-933 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-935 | T-Mobile AERIAL COMMUNICATIONS, INC. | – | no | yes |
| 281-940 | Onvoy ONVOY, LLC - TX | – | yes | yes |
| 281-960 | T-Mobile METROPCS, INC. | – | yes | yes |
| 281-965 | T-Mobile AERIAL COMMUNICATIONS, INC. | – | yes | yes |
| 281-966 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-971 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TX | – | yes | yes |
| 281-977 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 281-978 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-983 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-985 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-986 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-987 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 281-988 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-991 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-997 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-998 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 281-999 | AT&T SOUTHWESTERN BELL | – | no | 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 | 86 | 65.6% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | Verizon | 11 | 8.4% |
| METROPCS, INC. | T-Mobile | 7 | 5.3% |
| ONVOY, LLC - TX | Onvoy | 6 | 4.6% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TX | AT&T | 5 | 3.8% |
| AERIAL COMMUNICATIONS, INC. | T-Mobile | 5 | 3.8% |
| LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | Lumen | 4 | 3.1% |
| USFON, INC. - TX | – | 1 | 0.8% |
| AT&T - LOCAL | AT&T | 1 | 0.8% |
| SPOK, INC. | Spok | 1 | 0.8% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 0.8% |
| GRANDE COMMUNICATIONS NETWORKS, INC. - TX | – | 1 | 0.8% |
| LEVEL 3 COMMUNICATIONS, LLC - TX | Lumen | 1 | 0.8% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 0.8% |
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 HSTNSUBURB in area code 281?
131 blocks: 219, 227, 249, 258, 260, 272, 281, 293, 310, 330, 349, 366 and 119 more, all listed in the table above.
Which carriers have numbers in HSTNSUBURB?
SOUTHWESTERN BELL (86 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX (11 blocks), METROPCS, INC. (7 blocks), ONVOY, LLC - TX (6 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (5 blocks), AERIAL COMMUNICATIONS, INC. (5 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is HSTNSUBURB 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.