NumberResearchRecent thousands-block assignments
37 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-01-16 | 657-262-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-01-16 | 657-282-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2015-01-16 | 657-282-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2015-01-15 | 657-246-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BREA | CA |
| 2015-01-15 | 657-246-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BREA | CA |
| 2015-01-13 | 657-247-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SANTA ANA | CA |
| 2015-01-09 | 657-263-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | GARDEN GRV | CA |
| 2015-01-09 | 657-263-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | GARDEN GRV | CA |
| 2015-01-08 | 657-256-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CYPRESS | CA |
| 2014-12-26 | 657-254-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2014-12-26 | 657-262-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-26 | 657-262-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-22 | 657-254-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-18 | 657-282-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | ORANGE | CA |
| 2014-12-16 | 657-239-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | BUENA PARK | CA |
| 2014-12-16 | 657-254-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-10 | 657-239-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2014-12-09 | 657-227-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | WESTMINSTR | CA |
| 2014-12-09 | 657-227-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | WESTMINSTR | CA |
| 2014-12-09 | 657-261-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SANTA ANA | CA |
| 2014-12-05 | 657-261-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2014-12-03 | 657-239-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BUENA PARK | CA |
| 2014-11-26 | 657-244-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | HUNTITNBCH | CA |
| 2014-11-26 | 657-244-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | HUNTITNBCH | CA |
| 2014-11-25 | 657-233-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | GARDEN GRV | CA |
| 2014-11-25 | 657-239-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | BUENA PARK | CA |
| 2014-11-25 | 657-239-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | BUENA PARK | CA |
| 2014-11-25 | 657-247-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SANTA ANA | CA |
| 2014-11-25 | 657-251-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | GARDEN GRV | CA |
| 2014-11-25 | 657-258-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | PLACENTIA | CA |
| 2014-11-21 | 657-247-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SANTA ANA | CA |
| 2014-11-20 | 657-261-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SANTA ANA | CA |
| 2014-11-19 | 657-256-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CYPRESS | CA |
| 2014-11-19 | 657-256-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CYPRESS | CA |
| 2014-11-19 | 657-256-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | CYPRESS | CA |
| 2014-11-19 | 657-256-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CYPRESS | CA |
| 2014-11-19 | 657-282-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | ORANGE | CA |
| 2014-11-19 | 657-282-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | ORANGE | CA |
| 2014-11-19 | 657-282-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | ORANGE | CA |
| 2014-11-18 | 657-261-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SANTA ANA | CA |
| 2014-11-18 | 657-261-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SANTA ANA | CA |
| 2014-11-18 | 657-261-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SANTA ANA | CA |
| 2014-11-18 | 657-261-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SANTA ANA | CA |
| 2014-11-18 | 657-261-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SANTA ANA | CA |
| 2014-11-17 | 657-254-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ANAHEIM | CA |
| 2014-11-10 | 657-244-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HUNTITNBCH | CA |
| 2014-11-10 | 657-247-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2014-11-05 | 657-256-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CYPRESS | CA |
| 2014-11-04 | 657-247-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SANTA ANA | CA |
| 2014-10-31 | 657-226-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLACENTIA | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.