NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

18 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 661
ONVOY, LLC - CA 10
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 3
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2
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
2022-08-24 661-610-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2022-08-24 661-610-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2022-08-24 661-610-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2022-08-24 661-610-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2022-08-24 661-610-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2022-08-19 661-512-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL AGDL CA
2022-08-19 661-539-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2022-08-19 661-581-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL PLDL CA
2022-08-16 661-531-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2022-08-11 661-581-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2022-08-11 661-581-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2022-08-11 661-936-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2022-08-11 661-936-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2022-08-09 661-581-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2022-08-09 661-581-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2022-07-21 661-569-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2022-07-20 661-610-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2022-07-20 661-610-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2022-07-13 661-649-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARVIN CA
2022-06-29 661-590-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WASCO CA
2022-06-22 661-279-4XXX 4000–4999Assigned COMMIO, LLC 939H ROSAMOND CA
2022-06-22 661-518-6XXX 6000–6999Assigned COMMIO, LLC 939H TEHACHAPI CA
2022-06-22 661-560-9XXX 9000–9999Assigned COMMIO, LLC 939H WASCO CA
2022-06-22 661-653-0XXX 0000–0999Assigned COMMIO, LLC 939H DELANO CA
2022-06-22 661-770-2XXX 2000–2999Assigned COMMIO, LLC 939H TAFT CA
2022-06-20 661-541-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2022-06-20 661-541-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2022-06-20 661-653-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2022-06-10 661-571-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2022-06-10 661-731-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EARLIMART CA
2022-06-03 661-453-2XXX 2000–2999Assigned TELNYX LLC 073H CLFRNHTSPG CA
2022-06-03 661-570-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BKFD SOUTH CA
2022-05-26 661-595-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2022-05-26 661-595-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2022-05-26 661-687-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD SOUTH CA
2022-05-26 661-687-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD SOUTH CA
2022-05-12 661-625-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2022-05-12 661-625-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2022-05-12 661-625-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2022-05-12 661-625-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2022-05-05 661-601-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BKFD NORTH CA
2022-05-02 661-338-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J LAKEHUGHES CA
2022-05-02 661-456-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J PLDL PLDL CA
2022-04-27 661-518-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2022-04-26 661-577-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TAFT CA
2022-04-25 661-560-1XXX 1000–1999Assigned METROPCS, INC. 5562 WASCO CA
2022-04-25 661-560-2XXX 2000–2999Assigned METROPCS, INC. 5562 WASCO CA
2022-04-25 661-653-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2022-04-12 661-571-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2022-04-12 661-571-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER 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.