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
2005-04-13 951-445-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2005-04-13 951-901-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA
2005-04-11 951-445-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2005-04-11 951-445-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2005-04-11 951-445-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2005-04-08 951-581-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-04-08 951-581-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2005-04-08 951-581-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2005-04-06 951-253-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2005-04-05 951-479-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2005-04-05 951-531-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-04-01 951-808-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2005-04-01 951-808-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2005-03-31 951-445-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2005-03-31 951-643-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARLINGTON CA
2005-03-31 951-643-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARLINGTON CA
2005-03-30 951-329-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2005-03-30 951-905-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2005-03-23 951-534-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-534-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-23 951-750-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-03-22 951-623-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-03-15 951-642-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-03-11 951-252-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J TEMECULA CA
2005-03-11 951-623-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2005-03-10 951-582-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CORONA CA
2005-03-09 951-526-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2005-03-07 951-489-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MORENO CA
2005-03-03 951-325-2XXX 2000–2999Assigned FRONTIER CALIFORNIA INC. 2319 HEMT HMLD CA
2005-03-02 951-479-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2005-03-01 951-526-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2005-02-28 951-489-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORENO CA
2005-02-24 951-252-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TEMECULA CA
2005-02-16 951-723-8XXX 8000–8999Assigned FRONTIER CALIFORNIA INC. 2319 SUN CITY CA
2005-02-14 951-332-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MIRA LOMA CA
2005-02-04 951-531-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-02-04 951-531-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2005-02-04 951-623-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2005-02-01 951-479-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CORONA CA
2005-02-01 951-565-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOODCREST CA
2005-02-01 951-588-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ARLINGTON CA
2005-01-31 951-643-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ARLINGTON CA
2005-01-26 951-565-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA
2005-01-26 951-727-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MIRA LOMA 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.