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
2011-03-22 951-291-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA
2011-03-21 951-292-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2011-03-16 951-530-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2011-03-16 951-530-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2011-03-16 951-892-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2011-03-15 951-332-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MIRA LOMA CA
2011-03-15 951-888-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERSIDE CA
2011-03-14 951-223-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT HMLD CA
2011-03-02 951-291-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA
2011-03-02 951-348-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2011-03-02 951-356-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CORONA CA
2011-03-02 951-356-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CORONA CA
2011-03-02 951-800-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C WOODCREST CA
2011-03-01 951-297-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 TEMECULA CA
2011-03-01 951-297-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 TEMECULA CA
2011-03-01 951-297-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 TEMECULA CA
2011-03-01 951-722-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2011-03-01 951-867-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2011-03-01 951-901-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WOODCREST CA
2011-02-23 951-999-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2011-02-22 951-322-1XXX 1000–1999Assigned MCC TELEPHONY OF THE WEST, LLC - CA 857F PERRIS CA
2011-02-18 951-291-6XXX 6000–6999Assigned MCC TELEPHONY OF THE WEST, LLC - CA 857F ELSINORE CA
2011-02-18 951-878-4XXX 4000–4999Assigned MCC TELEPHONY OF THE WEST, LLC - CA 857F LAKEVIEWNU CA
2011-02-17 951-531-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2011-02-17 951-999-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2011-02-16 951-239-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2011-02-16 951-291-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D ELSINORE CA
2011-02-16 951-530-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2011-02-15 951-309-1XXX 1000–1999Assigned MCC TELEPHONY OF THE WEST, LLC - CA 857F SUN CITY CA
2011-02-10 951-599-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K HEMT HMLD CA
2011-02-07 951-293-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2011-02-07 951-293-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2011-02-07 951-293-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2011-02-07 951-293-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2011-02-07 951-565-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA
2011-01-24 951-299-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2011-01-21 951-530-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2011-01-13 951-667-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMSCL CNY CA
2011-01-12 951-213-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2011-01-11 951-249-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MURRIETA CA
2011-01-11 951-723-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2011-01-11 951-999-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2011-01-11 951-999-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MORENO CA
2011-01-04 951-213-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2010-12-13 951-389-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT ANZA CA
2010-12-13 951-468-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IDYLLWILD CA
2010-12-07 951-290-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2010-12-06 951-777-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2010-12-06 951-777-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2010-12-06 951-777-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RIVERSIDE 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.