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
2014-11-04 951-968-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MIRA LOMA CA
2014-10-31 951-390-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2014-10-31 951-390-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2014-10-27 951-523-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 CORONA CA
2014-10-27 951-523-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 CORONA CA
2014-10-27 951-523-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 CORONA CA
2014-10-27 951-523-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 CORONA CA
2014-10-27 951-523-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 CORONA CA
2014-10-21 951-396-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2014-10-21 951-396-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2014-10-20 951-472-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2014-10-15 951-902-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2014-10-15 951-992-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2014-10-13 951-428-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2014-10-13 951-428-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2014-10-13 951-428-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2014-10-10 951-339-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2014-10-10 951-434-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2014-10-10 951-434-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2014-10-08 951-397-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2014-10-08 951-397-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2014-10-08 951-426-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SNJC CA
2014-10-03 951-390-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HEMT CA
2014-10-03 951-390-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HEMT CA
2014-10-03 951-390-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HEMT CA
2014-10-03 951-434-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUN CITY CA
2014-10-03 951-434-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUN CITY CA
2014-10-03 951-434-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUN CITY CA
2014-10-03 951-434-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUN CITY CA
2014-10-02 951-382-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C TEMSCL CNY CA
2014-10-02 951-382-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C TEMSCL CNY CA
2014-10-02 951-395-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2014-10-02 951-396-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2014-10-02 951-396-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2014-09-29 951-425-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2014-09-29 951-425-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2014-09-26 951-432-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CORONA CA
2014-09-26 951-666-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CORONA CA
2014-09-25 951-379-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORENO CA
2014-09-24 951-423-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2014-09-24 951-423-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2014-09-24 951-423-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2014-09-24 951-423-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2014-09-24 951-423-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2014-09-24 951-434-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SUN CITY CA
2014-09-22 951-425-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2014-09-22 951-425-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2014-09-19 951-381-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BANNING CA
2014-09-19 951-381-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C BANNING CA
2014-09-18 951-432-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CORONA 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.