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
2020-12-14 661-516-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-12-14 661-516-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-12-14 661-516-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-12-10 661-545-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-12-10 661-545-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-12-10 661-545-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-12-10 661-545-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-12-10 661-545-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-11-25 661-624-1XXX 1000–1999Assigned IP HORIZON LLC 515J BKFD SOUTH CA
2020-11-09 661-955-5XXX 5000–5999Assigned FRACTEL, LLC 965H ARVIN CA
2020-11-03 661-545-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DELANO CA
2020-11-03 661-545-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DELANO CA
2020-10-27 661-461-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LEBEC CA
2020-10-21 661-293-6XXX 6000–6999Assigned METROPCS, INC. 5562 TAFT CA
2020-10-21 661-862-1XXX 1000–1999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2020-10-21 661-862-2XXX 2000–2999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2020-10-21 661-862-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2020-10-21 661-884-2XXX 2000–2999Assigned METROPCS, INC. 5562 WASCO CA
2020-10-20 661-545-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2020-10-15 661-215-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2020-10-15 661-242-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J LEBEC CA
2020-10-15 661-464-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2020-10-15 661-509-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BKFD SOUTH CA
2020-10-15 661-509-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BKFD SOUTH CA
2020-10-15 661-509-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BKFD SOUTH CA
2020-10-15 661-548-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J CLFRNHTSPG CA
2020-10-15 661-655-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2020-10-15 661-655-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2020-10-15 661-677-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2020-10-15 661-677-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2020-10-15 661-679-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J BKFD NORTH CA
2020-10-15 661-821-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J TEHACHAPI CA
2020-10-15 661-849-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J EARLIMART CA
2020-10-15 661-867-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J WALKERBSIN CA
2020-10-14 661-732-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2020-10-05 661-457-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LOST HILLS CA
2020-10-05 661-506-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2020-10-05 661-506-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2020-10-05 661-509-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2020-10-05 661-509-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2020-10-05 661-509-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2020-10-05 661-509-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2020-10-05 661-509-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2020-10-05 661-512-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLDL AGDL CA
2020-10-05 661-512-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C PLDL AGDL CA
2020-10-02 661-502-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2020-10-02 661-669-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2020-10-02 661-669-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2020-09-30 661-516-8XXX 8000–8999Assigned HD CARRIER LLC 321J BKFD MAIN CA
2020-09-30 661-516-9XXX 9000–9999Assigned HD CARRIER LLC 321J BKFD MAIN 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.