NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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 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
2010-06-04 951-842-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2010-06-03 951-223-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HMLD CA
2010-05-26 951-487-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2010-05-26 951-665-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2010-05-26 951-665-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2010-05-26 951-665-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2010-05-26 951-665-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2010-05-19 951-254-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2010-05-17 951-289-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2010-04-28 951-525-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2010-04-06 951-291-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA
2010-04-05 951-290-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2010-04-05 951-821-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2010-03-31 951-254-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORONA CA
2010-03-31 951-287-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PERRIS CA
2010-03-31 951-289-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2010-03-31 951-525-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ARLINGTON CA
2010-03-31 951-723-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUN CITY CA
2010-03-31 951-842-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2010-03-26 951-290-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2010-03-25 951-427-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CORONA CA
2010-03-23 951-234-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2010-03-23 951-268-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2010-03-23 951-330-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2010-03-11 951-525-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ARLINGTON CA
2010-02-16 951-330-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2010-02-11 951-525-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2010-02-10 951-234-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2010-02-09 951-842-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2010-02-09 951-842-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2010-02-09 951-842-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2010-02-08 951-461-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2010-02-04 951-287-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2010-02-04 951-287-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2010-02-04 951-595-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2010-02-04 951-595-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2010-02-03 951-398-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODCREST CA
2010-02-03 951-468-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IDYLLWILD CA
2010-02-03 951-638-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMSCL CNY CA
2010-02-03 951-878-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2010-01-26 951-287-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2010-01-26 951-287-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2010-01-26 951-287-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2010-01-19 951-289-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2010-01-19 951-289-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2010-01-08 951-330-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2010-01-08 951-330-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2010-01-08 951-330-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2010-01-06 951-901-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA
2010-01-05 951-269-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MORENO 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.