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
2014-06-10 951-396-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2014-06-10 951-396-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2014-06-10 951-432-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2014-06-10 951-432-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2014-06-09 951-394-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2014-06-09 951-395-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2014-06-09 951-395-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2014-06-04 951-386-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WOODCREST CA
2014-05-29 951-257-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IDYLLWILD CA
2014-05-29 951-350-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEMT SNJC CA
2014-05-28 951-364-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEMT SAGE CA
2014-05-28 951-744-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEMT ANZA CA
2014-05-27 951-382-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMSCL CNY CA
2014-05-27 951-382-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMSCL CNY CA
2014-05-27 951-395-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2014-05-27 951-395-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2014-05-23 951-394-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2014-05-23 951-394-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2014-05-23 951-394-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2014-05-23 951-394-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2014-05-21 951-435-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PERRIS CA
2014-05-20 951-435-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PERRIS CA
2014-05-20 951-435-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PERRIS CA
2014-05-16 951-388-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 HEMT HMLD CA
2014-05-15 951-387-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2014-05-12 951-228-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA
2014-05-01 951-226-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELSINORE CA
2014-04-29 951-350-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SNJC CA
2014-04-29 951-903-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2014-04-24 951-744-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT ANZA CA
2014-04-23 951-357-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2014-04-23 951-384-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2014-04-18 951-393-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2014-04-17 951-381-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BANNING CA
2014-04-16 951-399-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D ELSINORE CA
2014-04-11 951-384-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIVERSIDE CA
2014-04-10 951-260-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HEMT CA
2014-04-10 951-370-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2014-04-10 951-376-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARLINGTON CA
2014-04-10 951-387-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRIETA CA
2014-04-07 951-332-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MIRA LOMA CA
2014-04-07 951-384-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 RIVERSIDE CA
2014-04-04 951-388-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2014-04-04 951-388-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2014-04-04 951-388-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2014-04-04 951-388-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2014-04-03 951-972-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 TEMECULA CA
2014-03-24 951-395-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2014-03-19 951-790-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MIRA LOMA CA
2014-03-18 951-363-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MORENO 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.