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
2013-06-17 951-349-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2013-06-17 951-350-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2013-06-13 951-374-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2013-06-12 951-379-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K MORENO CA
2013-06-10 951-357-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HEMT CA
2013-06-10 951-374-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2013-06-10 951-374-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2013-06-10 951-374-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2013-06-10 951-383-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2013-05-29 951-365-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2013-05-29 951-383-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2013-05-22 951-363-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J MORENO CA
2013-05-13 951-374-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J RIVERSIDE CA
2013-05-13 951-374-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2013-05-02 951-376-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ARLINGTON CA
2013-04-25 951-363-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2013-04-24 951-376-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2013-04-08 951-365-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2013-04-08 951-365-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2013-04-08 951-374-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2013-04-05 951-339-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2013-04-05 951-666-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2013-04-04 951-703-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MIRA LOMA CA
2013-04-04 951-892-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2013-04-03 951-357-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2013-04-03 951-643-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ARLINGTON CA
2013-04-01 951-370-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2013-03-27 951-350-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT SNJC CA
2013-03-27 951-357-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HEMT CA
2013-03-27 951-365-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K TEMECULA CA
2013-03-27 951-366-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LAKEVIEWNU CA
2013-03-27 951-366-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LAKEVIEWNU CA
2013-03-27 951-399-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K ELSINORE CA
2013-03-25 951-350-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HEMT SNJC CA
2013-03-25 951-357-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HEMT HEMT CA
2013-03-25 951-357-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HEMT HEMT CA
2013-03-25 951-365-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TEMECULA CA
2013-03-25 951-365-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TEMECULA CA
2013-03-25 951-981-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K LAKEVIEWNU CA
2013-03-19 951-267-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K BANNING CA
2013-03-19 951-319-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K MURRIETA CA
2013-03-19 951-349-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K PERRIS CA
2013-03-19 951-363-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K MORENO CA
2013-03-19 951-527-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K IDYLLWILD CA
2013-03-19 951-603-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TEMSCL CNY CA
2013-03-19 951-723-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K SUN CITY CA
2013-03-19 951-900-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIVERSIDE CA
2013-03-19 951-900-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIVERSIDE CA
2013-03-18 951-228-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELSINORE CA
2013-03-18 951-267-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BANNING 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.