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 |
|---|---|---|---|---|---|---|---|
| 2010-01-12 | 657-200-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | WESTMINSTR | CA |
| 2009-12-03 | 657-859-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA ANA | CA |
| 2009-11-24 | 657-859-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SANTA ANA | CA |
| 2009-11-18 | 657-859-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SANTA ANA | CA |
| 2009-11-06 | 657-622-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2009-11-06 | 657-622-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2009-10-29 | 657-622-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2009-10-28 | 657-622-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SANTA ANA | CA |
| 2009-10-22 | 657-201-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ANAHEIM | CA |
| 2009-10-22 | 657-201-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ANAHEIM | CA |
| 2009-10-09 | 657-464-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HUNTITNBCH | CA |
| 2009-09-11 | 657-622-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANTA ANA | CA |
| 2009-09-11 | 657-622-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANTA ANA | CA |
| 2009-08-26 | 657-859-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | SANTA ANA | CA |
| 2009-06-16 | 657-201-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-05-19 | 657-622-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | SANTA ANA | CA |
| 2009-05-19 | 657-622-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | SANTA ANA | CA |
| 2009-05-19 | 657-622-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | SANTA ANA | CA |
| 2009-05-19 | 657-622-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | SANTA ANA | CA |
| 2009-03-23 | 657-200-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WESTMINSTR | CA |
| 2009-02-24 | 657-200-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | WESTMINSTR | CA |
| 2009-02-11 | 657-202-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ANAHEIM | CA |
| 2009-02-11 | 657-202-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-02-11 | 657-202-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-02-11 | 657-202-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-02-11 | 657-202-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-02-11 | 657-202-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ANAHEIM | CA |
| 2009-02-11 | 657-202-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ANAHEIM | CA |
| 2009-02-11 | 657-202-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-02-11 | 657-202-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | ANAHEIM | CA |
| 2009-02-11 | 657-202-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ANAHEIM | CA |
| 2009-01-20 | 657-464-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HUNTITNBCH | CA |
| 2008-11-21 | 657-278-0XXX | 0000–0999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-1XXX | 1000–1999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-11-21 | 657-278-9XXX | 9000–9999 | Assigned | PACIFIC BELL | 9740 | FULLERTON | CA |
| 2008-10-24 | 657-464-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | HUNTITNBCH | CA |
| 2008-10-23 | 657-464-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HUNTITNBCH | CA |
| 2008-10-23 | 657-464-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HUNTITNBCH | CA |
| 2008-10-08 | 657-859-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2008-09-24 | 657-859-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | SANTA ANA | CA |
| 2008-09-22 | 657-201-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2008-08-11 | 657-200-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | WESTMINSTR | CA |
| 2008-06-12 | 657-859-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | 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.