NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 510
ONVOY, LLC - CA 3
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
2013-04-04 510-990-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2013-04-03 510-256-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CROCKETT CA
2013-03-28 510-907-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2013-03-27 510-990-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2013-03-19 510-210-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RICHMOND CA
2013-03-19 510-210-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RICHMOND CA
2013-03-19 510-254-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD ALMD CA
2013-03-19 510-454-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD TRNID CA
2013-03-19 510-564-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD TRNID CA
2013-03-19 510-646-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD BKLY CA
2013-03-19 510-646-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD BKLY CA
2013-03-19 510-775-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD ALMD CA
2013-03-18 510-318-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD MN-PD CA
2013-03-18 510-338-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD MN-PD CA
2013-03-14 510-803-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HRCUL-RODE CA
2013-03-14 510-803-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HRCUL-RODE CA
2013-03-12 510-775-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2013-03-08 510-775-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2013-03-07 510-646-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2013-03-07 510-646-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2013-03-01 510-256-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CROCKETT CA
2013-03-01 510-256-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CROCKETT CA
2013-03-01 510-298-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK MAIN CA
2013-03-01 510-298-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK MAIN CA
2013-03-01 510-403-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK OLIVR CA
2013-03-01 510-403-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK OLIVR CA
2013-03-01 510-474-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK GRNLF CA
2013-03-01 510-474-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK GRNLF CA
2013-03-01 510-488-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD FRTVL CA
2013-03-01 510-842-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD FRTVL CA
2013-03-01 510-908-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD MN-PD CA
2013-03-01 510-908-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD MN-PD CA
2013-03-01 510-964-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELSBR-PINL CA
2013-03-01 510-964-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELSBR-PINL CA
2013-03-01 510-982-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2013-02-28 510-454-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2013-02-28 510-455-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2013-02-28 510-479-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2013-02-28 510-779-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2013-02-28 510-824-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2013-02-28 510-853-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2013-02-28 510-972-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2013-02-26 510-398-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2013-02-14 510-454-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD TRNID CA
2013-02-12 510-563-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2013-02-12 510-564-5XXX 5000–5999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2013-02-12 510-564-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2013-01-31 510-298-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J FRNK MAIN CA
2013-01-31 510-328-8XXX 8000–8999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2013-01-31 510-328-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD FRTVL 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.