NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

18 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2023-12-29 661-420-2XXX 2000–2999Assigned COMMIO, LLC 939H CUYAMA CA
2023-12-29 661-569-3XXX 3000–3999Assigned COMMIO, LLC 939H BKFD MAIN CA
2023-12-29 661-629-0XXX 0000–0999Assigned COMMIO, LLC 939H BKFD NORTH CA
2023-12-29 661-629-1XXX 1000–1999Assigned COMMIO, LLC 939H BKFD NORTH CA
2023-12-29 661-687-0XXX 0000–0999Assigned COMMIO, LLC 939H BKFD SOUTH CA
2023-12-29 661-687-1XXX 1000–1999Assigned COMMIO, LLC 939H BKFD SOUTH CA
2023-12-29 661-687-2XXX 2000–2999Assigned COMMIO, LLC 939H BKFD SOUTH CA
2023-12-28 661-407-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD MAIN CA
2023-12-27 661-687-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD SOUTH CA
2023-12-27 661-687-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD SOUTH CA
2023-12-27 661-687-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD SOUTH CA
2023-12-18 661-649-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2023-12-15 661-642-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 DELANO CA
2023-12-11 661-604-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2023-12-11 661-964-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2023-12-06 661-385-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H EDWARDS CA
2023-12-06 661-420-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CUYAMA CA
2023-12-06 661-457-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H LOST HILLS CA
2023-12-06 661-551-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BERENDMESA CA
2023-12-06 661-591-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H GLENNVILLE CA
2023-12-06 661-597-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MOJAVE CA
2023-12-06 661-689-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CLFRNHTSPG CA
2023-12-06 661-761-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MCKITTRICK CA
2023-12-06 661-764-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BUTTONWLLW CA
2023-12-06 661-773-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H WALKERBSIN CA
2023-12-05 661-550-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BIG BUTTE CA
2023-12-05 661-997-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2023-12-01 661-595-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-596-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-596-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-596-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-612-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-612-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-612-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-612-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-612-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-12-01 661-612-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2023-11-15 661-694-6XXX 6000–6999Assigned NUSO, LLC 732J BKFD NORTH CA
2023-10-25 661-595-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-10-25 661-595-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-10-25 661-595-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-10-17 661-519-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J ARVIN CA
2023-10-16 661-500-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TAFT CA
2023-10-05 661-595-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2023-10-05 661-595-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2023-10-05 661-595-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2023-10-05 661-595-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2023-10-05 661-636-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2023-10-03 661-386-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ROSAMOND CA
2023-10-03 661-386-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ROSAMOND CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.