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
2012-10-02 510-359-2XXX 2000–2999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-10-02 510-359-3XXX 3000–3999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-09-27 510-883-4XXX 4000–4999Assigned METROPCS, INC. 5562 OKLD BKLY CA
2012-09-21 510-318-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2012-09-20 510-313-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-09-20 510-322-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-09-20 510-322-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-09-20 510-322-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-09-20 510-322-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-09-20 510-358-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2012-09-14 510-744-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK MAIN CA
2012-09-14 510-775-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2012-09-14 510-775-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2012-09-14 510-775-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2012-09-12 510-306-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2012-09-12 510-985-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2012-09-12 510-987-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2012-09-12 510-992-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2012-08-24 510-398-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2012-08-24 510-398-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2012-08-24 510-900-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2012-08-24 510-990-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2012-08-22 510-322-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HRCUL-RODE CA
2012-08-17 510-359-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-08-17 510-398-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2012-08-16 510-255-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RICHMOND CA
2012-08-16 510-283-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2012-08-13 510-340-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-08-13 510-358-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2012-08-13 510-358-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2012-08-13 510-447-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2012-08-10 510-587-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2012-07-31 510-313-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-07-31 510-313-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-07-31 510-313-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-07-31 510-322-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-07-31 510-322-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2012-07-31 510-335-1XXX 1000–1999Assigned HD CARRIER LLC 321J FRNK MAIN CA
2012-07-31 510-335-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-07-31 510-335-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-07-31 510-335-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-07-31 510-335-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2012-07-31 510-340-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-07-31 510-340-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-07-31 510-340-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-07-31 510-340-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-07-31 510-340-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2012-07-31 510-447-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2012-07-31 510-447-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2012-07-31 510-447-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RICHMOND 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.