NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

27 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 25
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
2005-06-22 951-710-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARLINGTON CA
2005-06-20 951-325-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT HMLD CA
2005-06-19 951-880-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2005-06-19 951-880-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2005-06-19 951-880-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2005-06-17 951-767-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT SAGE CA
2005-06-14 951-756-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-06-09 951-816-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2005-06-08 951-306-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2005-06-03 951-579-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELSINORE CA
2005-06-02 951-816-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2005-06-02 951-816-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2005-06-01 951-847-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CORONA CA
2005-05-27 951-901-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA
2005-05-26 951-581-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2005-05-26 951-795-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2005-05-26 951-795-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2005-05-26 951-795-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2005-05-26 951-795-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2005-05-25 951-795-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D TEMECULA CA
2005-05-24 951-840-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2005-05-23 951-639-5XXX 5000–5999Assigned FRONTIER CALIFORNIA INC. 2319 SUN CITY CA
2005-05-22 951-329-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2005-05-22 951-329-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2005-05-22 951-905-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2005-05-17 951-581-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-05-13 951-490-4XXX 4000–4999Assigned FRONTIER CALIFORNIA INC. 2319 PERRIS CA
2005-05-10 951-445-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2005-05-10 951-445-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2005-05-10 951-445-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2005-05-10 951-445-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2005-05-10 951-813-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2005-05-04 951-445-4XXX 4000–4999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2005-05-04 951-760-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-05-04 951-760-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-05-03 951-326-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2005-04-27 951-487-3XXX 3000–3999Assigned FRONTIER CALIFORNIA INC. 2319 HEMT SNJC CA
2005-04-25 951-905-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-04-22 951-581-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-04-22 951-581-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-04-22 951-581-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-04-22 951-581-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-04-22 951-663-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2005-04-22 951-663-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2005-04-22 951-663-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2005-04-21 951-489-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2005-04-19 951-489-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2005-04-14 951-489-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2005-04-14 951-489-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2005-04-14 951-723-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY 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.