NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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 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
2011-07-22 951-534-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2011-07-21 951-309-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUN CITY CA
2011-07-19 951-708-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SAGE CA
2011-07-15 951-331-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2011-07-15 951-356-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CORONA CA
2011-07-14 951-356-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2011-07-12 951-221-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORENO CA
2011-06-30 951-309-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUN CITY CA
2011-06-30 951-708-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT SAGE CA
2011-06-27 951-329-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2011-06-27 951-642-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2011-06-24 951-888-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2011-06-24 951-888-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2011-06-22 951-221-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2011-06-22 951-623-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2011-06-03 951-305-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT HEMT CA
2011-05-31 951-297-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2011-05-31 951-297-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMECULA CA
2011-05-31 951-356-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORONA CA
2011-05-31 951-638-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMSCL CNY CA
2011-05-31 951-821-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUN CITY CA
2011-05-31 951-846-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BANNING CA
2011-05-31 951-878-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2011-05-27 951-221-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2011-05-24 951-348-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2011-05-23 951-223-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HMLD CA
2011-05-20 951-252-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 TEMECULA CA
2011-05-18 951-305-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HEMT CA
2011-05-18 951-305-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HEMT CA
2011-05-18 951-777-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2011-05-06 951-299-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ARLINGTON CA
2011-05-06 951-703-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MIRA LOMA CA
2011-05-06 951-703-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MIRA LOMA CA
2011-05-06 951-888-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2011-05-06 951-888-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2011-05-06 951-888-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2011-05-04 951-330-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2011-05-04 951-392-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2011-05-04 951-444-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORONA CA
2011-05-04 951-444-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORONA CA
2011-05-04 951-816-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2011-04-20 951-345-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2011-04-20 951-746-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2011-04-19 951-297-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2011-04-19 951-526-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2011-04-12 951-221-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2011-04-08 951-999-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2011-04-08 951-999-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2011-03-29 951-638-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C TEMSCL CNY CA
2011-03-23 951-299-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ARLINGTON 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.