NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

27 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 951
ONVOY, LLC - CA 25
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 1
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
2021-09-09 951-528-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-09-09 951-574-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2021-09-08 951-944-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2021-09-08 951-944-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2021-09-08 951-944-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2021-09-08 951-944-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2021-09-01 951-556-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2021-09-01 951-944-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2021-09-01 951-944-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2021-08-31 951-593-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-08-27 951-585-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-08-27 951-585-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-08-27 951-585-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-08-27 951-585-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-08-19 951-629-4XXX 4000–4999Assigned COMMIO, LLC 939H HEMT SNJC CA
2021-08-19 951-629-5XXX 5000–5999Assigned COMMIO, LLC 939H HEMT SNJC CA
2021-07-29 951-585-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-07-29 951-585-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-07-29 951-585-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-07-29 951-585-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-07-29 951-585-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-07-29 951-586-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-586-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-589-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-589-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-589-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-589-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-589-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-07-29 951-590-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2021-07-29 951-590-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2021-07-29 951-590-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2021-07-29 951-590-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2021-07-13 951-944-4XXX 4000–4999Assigned FRACTEL, LLC 965H ARLINGTON CA
2021-07-02 951-410-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2021-07-02 951-503-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PERRIS CA
2021-07-02 951-503-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C PERRIS CA
2021-07-02 951-516-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2021-07-02 951-516-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2021-07-02 951-516-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2021-07-02 951-516-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2021-07-02 951-517-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-07-02 951-517-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C TEMECULA 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.