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
2012-04-25 510-948-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-04-25 510-948-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-04-25 510-948-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-04-25 510-948-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-04-17 510-600-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2012-04-16 510-370-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-16 510-370-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2012-04-10 510-600-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-04-09 510-600-1XXX 1000–1999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-03-22 510-254-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD ALMD CA
2012-03-21 510-343-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID CA
2012-03-21 510-770-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2012-03-20 510-628-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD MN-PD CA
2012-03-19 510-600-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2012-03-12 510-600-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-03-12 510-600-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-03-01 510-294-0XXX 0000–0999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-03-01 510-294-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2012-02-29 510-982-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2012-02-21 510-613-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2012-02-21 510-686-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2012-02-17 510-516-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2012-02-15 510-867-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2012-02-14 510-246-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-02-14 510-984-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2012-02-10 510-246-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAYWARD CA
2012-02-10 510-500-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD FRTVL CA
2012-02-10 510-957-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD TRNID CA
2012-02-08 510-900-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2012-02-06 510-779-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2012-02-03 510-400-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2012-02-03 510-447-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHMOND CA
2012-01-30 510-335-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-01-30 510-335-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-01-25 510-500-7XXX 7000–7999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2012-01-25 510-739-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-01-24 510-972-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2012-01-13 510-294-1XXX 1000–1999Assigned PACIFIC BELL 9740 HAYWARD CA
2012-01-13 510-294-2XXX 2000–2999Assigned PACIFIC BELL 9740 HAYWARD CA
2012-01-13 510-294-3XXX 3000–3999Assigned PACIFIC BELL 9740 HAYWARD CA
2012-01-13 510-294-4XXX 4000–4999Assigned PACIFIC BELL 9740 HAYWARD CA
2012-01-13 510-294-5XXX 5000–5999Assigned PACIFIC BELL 9740 HAYWARD 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.