NumberResearchRecent thousands-block assignments
11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 |
|---|---|---|---|---|---|---|---|
| 2009-06-12 | 281-399-6XXX | 6000–6999 | Assigned | WESTEL, INC. - TX | 7399 | SPLENDORA | TX |
| 2009-06-11 | 281-619-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HSTNSUBURB | TX |
| 2009-06-11 | 281-809-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HSTNSUBURB | TX |
| 2009-06-04 | 281-606-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HSTNSUBURB | TX |
| 2009-06-04 | 281-864-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | CHANNELVW | TX |
| 2009-05-28 | 281-809-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | HSTNSUBURB | TX |
| 2009-05-21 | 281-886-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HSTNSUBURB | TX |
| 2009-05-18 | 281-809-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HSTNSUBURB | TX |
| 2009-05-13 | 281-946-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | DEER PARK | TX |
| 2009-04-24 | 281-666-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | CROSBY | TX |
| 2009-04-24 | 281-866-1XXX | 1000–1999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2009-04-24 | 281-866-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2009-04-24 | 281-891-0XXX | 0000–0999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2009-04-15 | 281-713-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HUMBLE | TX |
| 2009-04-06 | 281-968-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | ALVIN | TX |
| 2009-04-03 | 281-661-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2009-03-18 | 281-737-0XXX | 0000–0999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-1XXX | 1000–1999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-7XXX | 7000–7999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-8XXX | 8000–8999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-9XXX | 9000–9999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-04 | 281-676-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BARKER | TX |
| 2009-03-04 | 281-715-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | DEER PARK | TX |
| 2009-03-04 | 281-715-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | DEER PARK | TX |
| 2009-02-27 | 281-318-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | HUMBLE | TX |
| 2009-02-24 | 281-836-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | BAMMEL | TX |
| 2009-02-24 | 281-949-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | SATSUMA | TX |
| 2009-02-13 | 281-673-0XXX | 0000–0999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2009-02-13 | 281-673-8XXX | 8000–8999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2009-02-04 | 281-202-1XXX | 1000–1999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | RICHMNRNBG | TX |
| 2009-02-02 | 281-969-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | STAFFORD | TX |
| 2009-01-30 | 281-552-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | HSTNSUBURB | TX |
| 2009-01-30 | 281-652-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TX | 903C | HOUSTON | TX |
| 2009-01-30 | 281-673-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TX | 903C | BAMMEL | TX |
| 2009-01-30 | 281-677-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TX | 903C | HSTNSUBURB | TX |
| 2009-01-30 | 281-716-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TX | 903C | BAMMEL | TX |
| 2009-01-30 | 281-721-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TX | 903C | HSTNSUBURB | TX |
| 2009-01-30 | 281-749-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TX | 903C | HSTNSUBURB | TX |
| 2009-01-30 | 281-754-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TX | 903C | HSTNSUBURB | TX |
| 2009-01-27 | 281-241-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | DEER PARK | TX |
| 2009-01-27 | 281-318-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | HUMBLE | TX |
| 2009-01-27 | 281-318-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | HUMBLE | TX |
| 2009-01-27 | 281-371-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | KATY | TX |
| 2009-01-27 | 281-410-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | STAFFORD | TX |
| 2009-01-27 | 281-549-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | KEMAH | TX |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.