NumberResearchRecent thousands-block assignments
37 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 657
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 |
|---|---|---|---|---|---|---|---|
| 2015-05-05 | 657-271-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | WESTMINSTR | CA |
| 2015-05-05 | 657-273-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SANTA ANA | CA |
| 2015-04-29 | 657-699-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-04-24 | 657-258-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLACENTIA | CA |
| 2015-04-24 | 657-258-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLACENTIA | CA |
| 2015-04-23 | 657-263-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | GARDEN GRV | CA |
| 2015-04-22 | 657-238-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CYPRESS | CA |
| 2015-04-22 | 657-699-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-04-22 | 657-699-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-04-22 | 657-699-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-04-22 | 657-699-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-04-22 | 657-699-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-04-15 | 657-274-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2015-04-15 | 657-274-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2015-04-15 | 657-274-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2015-04-15 | 657-274-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2015-04-10 | 657-258-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLACENTIA | CA |
| 2015-04-07 | 657-255-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BUENA PARK | CA |
| 2015-04-02 | 657-699-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SANTA ANA | CA |
| 2015-03-27 | 657-239-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-239-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-239-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-239-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-252-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-252-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-252-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-252-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-27 | 657-252-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2015-03-26 | 657-248-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FULLERTON | CA |
| 2015-03-26 | 657-248-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FULLERTON | CA |
| 2015-03-24 | 657-264-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-264-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-265-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-265-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-265-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-265-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-265-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2015-03-24 | 657-265-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
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.