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
2013-11-25 951-386-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2013-11-25 951-389-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT ANZA CA
2013-11-25 951-435-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PERRIS CA
2013-11-25 951-527-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IDYLLWILD CA
2013-11-20 951-387-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MURRIETA CA
2013-11-05 951-365-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2013-11-05 951-370-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2013-11-05 951-370-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2013-11-01 951-379-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MORENO CA
2013-11-01 951-379-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C MORENO CA
2013-11-01 951-380-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2013-11-01 951-380-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2013-11-01 951-968-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MIRA LOMA CA
2013-11-01 951-968-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MIRA LOMA CA
2013-10-31 951-386-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C WOODCREST CA
2013-10-31 951-386-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C WOODCREST CA
2013-10-21 951-384-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIVERSIDE CA
2013-10-15 951-380-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2013-10-15 951-435-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PERRIS CA
2013-10-14 951-292-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 HEMT SNJC CA
2013-10-14 951-350-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2013-10-14 951-350-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2013-10-08 951-384-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2013-09-10 951-376-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2013-09-04 951-348-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2013-09-04 951-355-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2013-09-04 951-365-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2013-09-04 951-365-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2013-09-04 951-382-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMSCL CNY CA
2013-08-28 951-923-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2013-08-28 951-923-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2013-08-28 951-923-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2013-08-28 951-923-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2013-08-28 951-923-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2013-08-27 951-923-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HEMT HMLD CA
2013-08-16 951-386-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2013-08-05 951-374-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 RIVERSIDE CA
2013-08-01 951-319-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2013-08-01 951-374-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2013-07-23 951-383-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K TEMECULA CA
2013-07-22 951-267-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K BANNING CA
2013-07-22 951-319-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K MURRIETA CA
2013-07-22 951-339-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K CORONA CA
2013-07-22 951-350-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT SNJC CA
2013-07-16 951-228-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D ELSINORE CA
2013-07-08 951-376-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2013-06-28 951-357-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HEMT CA
2013-06-28 951-357-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HEMT CA
2013-06-28 951-357-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HEMT CA
2013-06-28 951-374-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE 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.