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
2018-01-24 951-512-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2018-01-24 951-512-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2018-01-24 951-512-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2018-01-24 951-512-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2018-01-23 951-419-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2018-01-23 951-459-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2018-01-23 951-459-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2018-01-11 951-336-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CORONA CA
2018-01-02 951-494-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C IDYLLWILD CA
2017-12-22 951-362-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MIRA LOMA CA
2017-12-22 951-963-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CORONA CA
2017-12-21 951-783-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2017-12-15 951-416-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2017-12-13 951-419-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MORENO CA
2017-12-12 951-441-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2017-12-12 951-441-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2017-12-11 951-671-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-362-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MIRA LOMA CA
2017-11-30 951-362-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MIRA LOMA CA
2017-11-30 951-671-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-7XXX 7000–7999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-30 951-671-8XXX 8000–8999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 MURRIETA CA
2017-11-20 951-817-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CORONA CA
2017-11-15 951-459-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K ELSINORE CA
2017-11-09 951-459-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2017-11-03 951-419-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2017-11-01 951-262-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT ANZA CA
2017-11-01 951-429-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2017-11-01 951-439-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT SAGE CA
2017-11-01 951-651-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT SNJC CA
2017-10-25 951-430-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SUN CITY CA
2017-10-20 951-412-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MURRIETA CA
2017-10-20 951-419-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C MORENO CA
2017-10-20 951-419-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MORENO CA
2017-10-20 951-419-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MORENO CA
2017-10-20 951-449-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PERRIS CA
2017-10-20 951-524-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BANNING CA
2017-10-19 951-783-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2017-10-19 951-783-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2017-10-18 951-414-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K TEMECULA CA
2017-10-18 951-441-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2017-10-18 951-441-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2017-10-05 951-758-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIVERSIDE CA
2017-10-04 951-550-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2017-09-25 951-651-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT SNJC 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.