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
2016-11-15 951-262-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HEMT ANZA CA
2016-11-15 951-418-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2016-11-14 951-417-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2016-11-10 951-414-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2016-11-08 951-407-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2016-11-07 951-410-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-11-07 951-410-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-11-01 951-407-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2016-11-01 951-447-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2016-10-31 951-497-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2016-10-31 951-623-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2016-10-12 951-417-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2016-10-12 951-417-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2016-10-12 951-602-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C ARLINGTON CA
2016-10-11 951-497-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2016-10-11 951-497-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2016-10-04 951-406-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2016-10-04 951-406-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2016-10-04 951-406-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2016-10-03 951-484-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-09-30 951-483-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2016-09-30 951-484-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 HEMT HEMT CA
2016-09-26 951-484-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2016-09-23 951-409-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K ELSINORE CA
2016-09-23 951-483-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2016-09-22 951-406-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2016-09-22 951-406-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2016-09-21 951-495-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-21 951-495-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2016-09-16 951-409-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2016-09-16 951-483-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2016-09-16 951-567-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2016-09-14 951-409-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D ELSINORE CA
2016-09-14 951-410-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2016-09-14 951-426-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2016-09-13 951-416-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2016-09-01 951-416-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MIRA LOMA CA
2016-08-25 951-416-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MIRA LOMA CA
2016-08-25 951-494-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 IDYLLWILD CA
2016-08-25 951-744-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT ANZA CA
2016-08-24 951-474-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2016-08-24 951-474-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC 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.