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
2002-09-13 951-304-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MURRIETA CA
2002-09-11 951-304-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MURRIETA CA
2002-09-05 951-755-5XXX 5000–5999Assigned AT&T - LOCAL 7421 BANNING CA
2002-08-27 951-488-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MORENO CA
2002-08-15 951-304-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MURRIETA CA
2002-08-01 951-231-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 RIVERSIDE CA
2002-07-11 951-304-3XXX 3000–3999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2002-07-10 951-665-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT SNJC CA
2002-07-01 951-834-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MURRIETA CA
2002-06-21 951-491-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TEMECULA CA
2002-05-21 951-552-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 ARLINGTON CA
2002-05-16 951-253-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA
2002-05-16 951-537-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2002-05-16 951-763-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HEMT ANZA CA
2002-05-01 951-304-2XXX 2000–2999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2002-04-12 951-256-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CORONA CA
2002-04-03 951-493-6XXX 6000–6999Assigned PACIFIC BELL 9740 CORONA CA
2002-02-12 951-304-9XXX 9000–9999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2001-12-21 951-461-8XXX 8000–8999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2001-12-07 951-727-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MIRA LOMA CA
2001-12-07 951-776-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WOODCREST CA
2001-11-07 951-461-7XXX 7000–7999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2001-11-02 951-710-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARLINGTON CA
2001-10-17 951-749-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MIRA LOMA CA
2001-10-12 951-436-2XXX 2000–2999Assigned AT&T - LOCAL 7421 PERRIS CA
2001-09-21 951-461-4XXX 4000–4999Assigned FRONTIER CALIFORNIA INC. 2319 MURRIETA CA
2001-08-14 951-231-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J RIVERSIDE CA
2001-07-18 951-719-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J TEMECULA CA
2001-06-15 951-256-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CORONA CA
2001-05-28 951-491-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TEMECULA CA
2001-05-14 951-256-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CORONA CA
2001-05-14 951-326-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TEMECULA CA
2001-05-14 951-354-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 ARLINGTON CA
2001-05-14 951-492-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 HEMT HEMT CA
2001-05-14 951-571-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MORENO CA
2001-05-14 951-667-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TEMSCL CNY CA
2001-04-09 951-277-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEMSCL CNY CA
2001-02-26 951-492-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J HEMT HEMT CA
2001-02-26 951-727-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MIRA LOMA CA
2001-01-18 951-567-5XXX 5000–5999Assigned PAETEC COMMUNICATIONS, INC. - CA 4733 MORENO CA
2001-01-18 951-567-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MORENO CA
2001-01-12 951-443-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PERRIS CA
2001-01-12 951-492-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT HEMT CA
2001-01-12 951-727-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MIRA LOMA CA
2000-12-10 951-572-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BANNING CA
2000-12-10 951-763-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 HEMT ANZA CA
2000-12-10 951-767-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 HEMT SAGE CA
2000-12-10 951-894-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MURRIETA CA
2000-12-09 951-324-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON CA
2000-12-09 951-905-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 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.