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
2021-06-08 951-508-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2021-05-27 951-416-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2021-05-27 951-968-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2021-05-16 951-516-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2021-05-16 951-516-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2021-05-16 951-574-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2021-05-15 951-480-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2021-05-15 951-480-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2021-05-11 951-507-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2021-05-11 951-569-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2021-05-11 951-576-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2021-05-11 951-903-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2021-05-11 951-933-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2021-05-10 951-583-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2021-05-10 951-583-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2021-05-10 951-583-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2021-05-10 951-583-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2021-05-10 951-910-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HEMT SAGE CA
2021-05-10 951-910-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HEMT SAGE CA
2021-05-09 951-576-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA
2021-05-05 951-516-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SUN CITY CA
2021-05-04 951-578-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ARLINGTON CA
2021-04-30 951-584-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-30 951-584-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-30 951-584-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-30 951-584-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-30 951-584-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-30 951-584-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-29 951-540-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LAKEVIEWNU CA
2021-04-29 951-583-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2021-04-28 951-253-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSINORE CA
2021-04-28 951-866-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-28 951-866-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-28 951-866-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-28 951-866-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2021-04-23 951-910-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HEMT SAGE CA
2021-04-22 951-517-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2021-04-22 951-517-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2021-04-22 951-644-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BANNING CA
2021-04-22 951-644-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BANNING CA
2021-04-22 951-644-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BANNING CA
2021-04-17 951-561-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMSCL CNY CA
2021-04-16 951-569-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2021-04-16 951-569-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2021-04-13 951-540-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2021-04-13 951-540-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2021-04-13 951-540-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2021-04-13 951-540-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2021-04-12 951-629-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2021-04-12 951-629-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 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.