NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

37 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 36
BANDWIDTH.COM CLEC, LLC - CA 1
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-04-16 657-225-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-225-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-228-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-228-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-245-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-245-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-245-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-245-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-330-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-330-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-330-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-330-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-378-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-378-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-378-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FULLERTON CA
2012-04-16 657-383-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-383-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-383-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-16 657-383-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ANA CA
2012-04-10 657-666-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C WESTMINSTR CA
2012-04-05 657-229-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2012-04-05 657-600-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2012-04-05 657-600-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2012-04-05 657-600-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2012-04-05 657-600-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2012-04-04 657-800-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C GARDEN GRV CA
2012-04-02 657-300-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HUNTITNBCH CA
2012-04-02 657-300-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HUNTITNBCH CA
2012-04-02 657-400-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C WESTMINSTR CA
2012-04-02 657-400-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C WESTMINSTR CA
2012-03-28 657-222-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CYPRESS CA
2012-03-22 657-214-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K CYPRESS CA
2012-03-20 657-235-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2012-03-14 657-224-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ORANGE CA
2012-03-12 657-600-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2012-03-12 657-600-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2012-03-12 657-800-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C GARDEN GRV CA
2012-03-12 657-800-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C GARDEN GRV CA
2012-03-08 657-216-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K PLACENTIA CA
2012-03-02 657-235-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K SANTA ANA CA
2012-02-23 657-224-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K ORANGE CA
2012-02-15 657-214-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CYPRESS CA
2012-01-26 657-549-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANAHEIM 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.