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
2003-09-02 951-894-2XXX 2000–2999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2003-08-29 951-246-7XXX 7000–7999Assigned FRONTIER CALIFORNIA INC. 2319 SUN CITY CA
2003-08-22 951-609-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ELSINORE CA
2003-08-15 951-294-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J TEMECULA CA
2003-08-13 951-956-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2003-08-06 951-375-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2003-08-06 951-375-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2003-08-04 951-231-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-08-04 951-231-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-08-04 951-231-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-08-04 951-500-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-08-04 951-500-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-08-04 951-500-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-08-04 951-965-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-07-28 951-442-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2003-07-17 951-667-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TEMSCL CNY CA
2003-07-17 951-894-1XXX 1000–1999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2003-07-16 951-442-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2003-07-16 951-442-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2003-07-16 951-858-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2003-07-16 951-858-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2003-07-15 951-296-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-15 951-303-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-15 951-303-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-10 951-442-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2003-07-10 951-858-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2003-07-08 951-256-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2003-07-08 951-258-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2003-07-08 951-258-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2003-07-07 951-294-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-07 951-296-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-07 951-541-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-07 951-587-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-07 951-587-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-07 951-694-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2003-07-01 951-704-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2003-07-01 951-704-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2003-07-01 951-704-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2003-06-25 951-303-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2003-06-19 951-306-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2003-06-19 951-306-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2003-06-19 951-306-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2003-06-18 951-492-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2003-06-13 951-253-7XXX 7000–7999Assigned PACIFIC BELL (COMPETITIVE) 7480 ELSINORE CA
2003-06-03 951-500-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-06-03 951-500-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-06-03 951-500-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-06-03 951-500-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-06-03 951-500-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-06-03 951-500-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE 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.