NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 14
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
2016-08-23 951-407-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2016-08-23 951-407-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2016-08-23 951-412-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2016-08-23 951-412-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2016-08-22 951-439-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SAGE CA
2016-08-18 951-467-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HMLD CA
2016-08-18 951-474-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT SNJC CA
2016-08-15 951-414-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2016-08-15 951-414-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2016-08-15 951-414-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2016-08-12 951-916-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2016-08-10 951-388-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HMLD CA
2016-08-10 951-412-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MURRIETA CA
2016-08-09 951-409-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELSINORE CA
2016-08-09 951-410-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-08-08 951-406-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2016-08-08 951-476-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2016-08-08 951-476-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2016-08-08 951-478-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2016-08-08 951-478-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2016-08-08 951-478-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2016-08-04 951-241-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-07-21 951-404-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2016-07-21 951-429-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODCREST CA
2016-07-20 951-430-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUN CITY CA
2016-07-19 951-478-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2016-07-19 951-478-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2016-07-19 951-478-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2016-07-19 951-478-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2016-07-15 951-409-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2016-07-15 951-483-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2016-07-15 951-483-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2016-07-15 951-903-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2016-07-14 951-405-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2016-07-14 951-405-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2016-07-13 951-426-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2016-07-12 951-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2016-07-07 951-421-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2016-07-06 951-426-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SNJC CA
2016-07-05 951-409-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA
2016-07-01 951-484-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-07-01 951-484-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-06-29 951-421-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MORENO CA
2016-06-28 951-430-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUN CITY CA
2016-06-28 951-483-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PERRIS CA
2016-06-27 951-404-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2016-06-23 951-405-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2016-06-23 951-405-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2016-06-23 951-405-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2016-06-23 951-405-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.