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 |
|---|---|---|---|---|---|---|---|
| 2007-07-19 | 281-501-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2007-07-18 | 281-789-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | PINEHURST | TX |
| 2007-07-17 | 281-245-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2007-07-17 | 281-714-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-17 | 281-714-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-12 | 281-889-2XXX | 2000–2999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-07-12 | 281-889-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-07-12 | 281-889-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-07-12 | 281-889-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-07-12 | 281-889-6XXX | 6000–6999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-07-11 | 281-608-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | HUMBLE | TX |
| 2007-07-11 | 281-608-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | HUMBLE | TX |
| 2007-07-11 | 281-608-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HUMBLE | TX |
| 2007-07-11 | 281-608-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | HUMBLE | TX |
| 2007-07-11 | 281-714-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-11 | 281-714-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-11 | 281-714-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-11 | 281-714-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-11 | 281-714-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2007-07-09 | 281-865-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-865-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-865-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-865-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-865-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-995-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-995-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-995-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-995-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-07-09 | 281-995-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-29 | 281-990-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | APOLLO | TX |
| 2007-06-26 | 281-995-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-26 | 281-995-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-26 | 281-995-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-26 | 281-995-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-26 | 281-995-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-06-25 | 281-736-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-06-25 | 281-736-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| 2007-06-25 | 281-739-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2007-06-25 | 281-739-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | BAYTOWN | TX |
| 2007-06-22 | 281-865-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-22 | 281-865-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-22 | 281-865-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-22 | 281-865-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | HOUSTON | TX |
| 2007-06-22 | 281-865-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2007-06-21 | 281-803-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | TOMBALL | TX |
| 2007-06-21 | 281-907-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SPRING | TX |
| 2007-06-13 | 281-817-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | DEER PARK | TX |
| 2007-06-13 | 281-817-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | DEER PARK | TX |
| 2007-06-07 | 281-378-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | TOMBALL | TX |
| 2007-06-04 | 281-605-0XXX | 0000–0999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | 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.