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
2005-01-26 951-749-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MIRA LOMA CA
2005-01-26 951-968-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MIRA LOMA CA
2005-01-26 951-968-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J MIRA LOMA CA
2005-01-25 951-367-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-01-25 951-367-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-01-25 951-367-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-01-25 951-367-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-01-25 951-534-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RIVERSIDE CA
2005-01-25 951-750-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-01-19 951-567-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2005-01-19 951-922-6XXX 6000–6999Assigned FRONTIER CALIFORNIA INC. 2319 BANNING CA
2005-01-18 951-329-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-01-11 951-526-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2005-01-11 951-526-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2005-01-11 951-616-5XXX 5000–5999Assigned IP HORIZON LLC 515J MORENO CA
2005-01-11 951-616-6XXX 6000–6999Assigned IP HORIZON LLC 515J MORENO CA
2005-01-07 951-750-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-01-07 951-892-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-01-06 951-526-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 TEMECULA CA
2005-01-06 951-526-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-01-06 951-526-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-01-06 951-526-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-01-06 951-642-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-01-04 951-813-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2004-12-29 951-968-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MIRA LOMA CA
2004-12-28 951-623-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2004-12-28 951-813-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2004-12-21 951-623-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-12-17 951-623-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-12-14 951-531-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2004-12-10 951-750-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2004-12-09 951-643-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARLINGTON CA
2004-12-09 951-643-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARLINGTON CA
2004-12-08 951-442-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-12-08 951-537-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2004-12-08 951-537-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2004-12-08 951-765-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2004-11-30 951-749-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MIRA LOMA CA
2004-11-23 951-526-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2004-11-22 951-257-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IDYLLWILD CA
2004-11-19 951-639-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUN CITY CA
2004-11-17 951-813-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2004-11-16 951-257-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IDYLLWILD CA
2004-11-11 951-256-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2004-10-28 951-294-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2004-10-28 951-300-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2004-10-28 951-321-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2004-10-28 951-329-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2004-10-27 951-300-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-10-27 951-837-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MURRIETA 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.