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
2005-08-02 951-867-3XXX 3000–3999Assigned FRONTIER CALIFORNIA INC. 2319 MORENO CA
2005-08-01 951-992-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2005-07-29 951-345-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PERRIS CA
2005-07-28 951-602-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON CA
2005-07-28 951-602-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON CA
2005-07-28 951-602-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2005-07-28 951-710-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON CA
2005-07-28 951-710-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON CA
2005-07-28 951-867-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2005-07-28 951-867-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2005-07-27 951-552-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2005-07-26 951-271-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-07-26 951-566-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUN CITY CA
2005-07-26 951-795-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 TEMECULA CA
2005-07-26 951-816-3XXX 3000–3999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2005-07-26 951-847-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-07-22 951-345-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-07-22 951-345-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2005-07-20 951-867-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2005-07-20 951-880-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-07-20 951-880-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2005-07-08 951-795-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-07-08 951-795-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-07-08 951-795-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2005-07-08 951-880-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-07-07 951-256-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2005-07-07 951-520-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2005-07-07 951-520-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2005-07-07 951-520-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2005-07-07 951-813-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MURRIETA CA
2005-07-07 951-880-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-07-07 951-880-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-07-06 951-327-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT SNJC CA
2005-07-06 951-527-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IDYLLWILD CA
2005-07-06 951-579-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ELSINORE CA
2005-07-06 951-579-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ELSINORE CA
2005-07-06 951-663-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT HEMT CA
2005-07-06 951-763-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT ANZA CA
2005-07-06 951-916-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LAKEVIEWNU CA
2005-06-29 951-846-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BANNING CA
2005-06-28 951-489-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MORENO CA
2005-06-28 951-489-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MORENO CA
2005-06-27 951-332-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MIRA LOMA CA
2005-06-27 951-471-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 ELSINORE CA
2005-06-23 951-579-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ELSINORE CA
2005-06-23 951-581-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2005-06-23 951-880-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2005-06-23 951-893-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2005-06-23 951-893-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2005-06-22 951-332-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA 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.