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
2016-03-23 951-476-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2016-03-18 951-406-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ARLINGTON CA
2016-03-11 951-405-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RIVERSIDE CA
2016-03-09 951-366-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2016-03-09 951-366-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2016-03-07 951-391-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HEMT CA
2016-03-04 951-405-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-03-01 951-458-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2016-03-01 951-462-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-02-29 951-467-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HEMT HMLD CA
2016-02-29 951-467-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C HEMT HMLD CA
2016-02-26 951-421-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2016-02-25 951-433-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C TEMSCL CNY CA
2016-02-24 951-474-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HEMT SNJC CA
2016-02-24 951-474-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HEMT SNJC CA
2016-02-18 951-457-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2016-02-18 951-457-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2016-02-18 951-458-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2016-02-18 951-458-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2016-02-17 951-456-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C MIRA LOMA CA
2016-02-17 951-456-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MIRA LOMA CA
2016-02-16 951-438-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2016-02-16 951-438-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2016-02-12 951-420-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C PERRIS CA
2016-02-12 951-420-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PERRIS CA
2016-02-12 951-462-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2016-02-12 951-462-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2016-02-11 951-447-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2016-02-11 951-447-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2016-02-08 951-421-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MORENO CA
2016-02-08 951-421-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MORENO CA
2016-02-08 951-482-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2016-02-05 951-404-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2016-02-05 951-404-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2016-02-02 951-482-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CORONA CA
2016-02-02 951-482-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CORONA CA
2016-01-27 951-456-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2016-01-25 951-482-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2016-01-21 951-447-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2016-01-20 951-447-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2016-01-19 951-397-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K MURRIETA CA
2016-01-19 951-433-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C TEMSCL CNY CA
2016-01-19 951-987-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K CORONA CA
2016-01-12 951-463-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CORONA CA
2016-01-12 951-463-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CORONA CA
2016-01-12 951-476-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2016-01-12 951-476-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2016-01-12 951-987-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CORONA CA
2016-01-08 951-463-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2016-01-08 951-463-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONA 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.