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 |
|---|---|---|---|---|---|---|---|
| 2007-09-04 | 281-900-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-09-04 | 281-900-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-08-30 | 281-724-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | LEAGUECITY | TX |
| 2007-08-30 | 281-917-2XXX | 2000–2999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2007-08-30 | 281-917-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2007-08-30 | 281-917-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2007-08-30 | 281-917-6XXX | 6000–6999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2007-08-24 | 281-818-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2007-08-21 | 281-940-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HSTNSUBURB | TX |
| 2007-08-17 | 281-245-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2007-08-17 | 281-245-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2007-08-17 | 281-501-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-17 | 281-501-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-712-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KATY | TX |
| 2007-08-07 | 281-741-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2007-08-07 | 281-741-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2007-08-07 | 281-741-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2007-08-07 | 281-741-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2007-08-07 | 281-741-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2007-08-07 | 281-741-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2007-08-07 | 281-888-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-07 | 281-888-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2007-08-03 | 281-896-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HSTNSUBURB | TX |
| 2007-08-03 | 281-896-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2007-08-02 | 281-408-0XXX | 0000–0999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-08-02 | 281-408-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-08-02 | 281-408-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-08-02 | 281-408-6XXX | 6000–6999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-08-02 | 281-408-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-08-01 | 281-741-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HSTNSUBURB | TX |
| 2007-07-31 | 281-501-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TX | 903C | HOUSTON | TX |
| 2007-07-31 | 281-501-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | HOUSTON | TX |
| 2007-07-31 | 281-616-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | BARKER | TX |
| 2007-07-27 | 281-739-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BAYTOWN | TX |
| 2007-07-27 | 281-739-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BAYTOWN | TX |
| 2007-07-23 | 281-810-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | HSTNSUBURB | TX |
| 2007-07-19 | 281-501-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | 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.