NumberResearchRecent thousands-block assignments
11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 281
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-05-07 | 281-532-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KEMAH | TX |
| 2008-05-02 | 281-751-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | MONTBLVIEU | TX |
| 2008-05-01 | 281-475-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | SPRING | TX |
| 2008-04-25 | 281-676-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BARKER | TX |
| 2008-04-16 | 281-601-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | PORTER | TX |
| 2008-04-16 | 281-839-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2008-04-16 | 281-839-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2008-04-16 | 281-839-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2008-04-14 | 281-747-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | PORTER | TX |
| 2008-04-10 | 281-602-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | SPRING | TX |
| 2008-04-09 | 281-369-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | ROSHARON | TX |
| 2008-04-04 | 281-212-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TX | 903C | APOLLO | TX |
| 2008-04-04 | 281-898-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TX | 903C | APOLLO | TX |
| 2008-04-04 | 281-954-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TX | 903C | APOLLO | TX |
| 2008-04-04 | 281-954-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TX | 903C | APOLLO | TX |
| 2008-04-04 | 281-984-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TX | 903C | APOLLO | TX |
| 2008-04-01 | 281-645-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | WESTFIELD | TX |
| 2008-04-01 | 281-645-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TX | 903C | WESTFIELD | TX |
| 2008-03-27 | 281-475-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | SPRING | TX |
| 2008-03-21 | 281-656-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANGHAMCRK | TX |
| 2008-03-19 | 281-402-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | LA PORTE | TX |
| 2008-03-13 | 281-557-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | LEAGUECITY | TX |
| 2008-03-06 | 281-231-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | WESTFIELD | TX |
| 2008-03-06 | 281-231-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | WESTFIELD | TX |
| 2008-03-06 | 281-231-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | WESTFIELD | TX |
| 2008-03-06 | 281-231-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | WESTFIELD | TX |
| 2008-03-06 | 281-231-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | WESTFIELD | TX |
| 2008-03-05 | 281-762-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | RICHMNRNBG | TX |
| 2008-03-05 | 281-762-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | RICHMNRNBG | TX |
| 2008-03-05 | 281-854-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-03-05 | 281-854-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-03-05 | 281-854-7XXX | 7000–7999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-03-05 | 281-854-8XXX | 8000–8999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-03-05 | 281-854-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-03-03 | 281-739-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | BAYTOWN | TX |
| 2008-02-29 | 281-299-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2008-02-29 | 281-824-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2008-02-27 | 281-758-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | CYPRESS | TX |
| 2008-02-26 | 281-617-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2008-02-26 | 281-739-8XXX | 8000–8999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2008-02-19 | 281-549-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | KEMAH | TX |
| 2008-02-15 | 281-902-2XXX | 2000–2999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-02-15 | 281-902-6XXX | 6000–6999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2008-02-15 | 281-993-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | FRIENDSWD | TX |
| 2008-02-08 | 281-763-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2008-02-08 | 281-763-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2008-02-08 | 281-806-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLEVELAND | TX |
| 2008-02-08 | 281-832-2XXX | 2000–2999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2008-02-08 | 281-832-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2008-02-08 | 281-832-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.