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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-02-22 661-545-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2021-02-22 661-744-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-02-22 661-744-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-02-22 661-744-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-02-22 661-744-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-02-22 661-744-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-02-22 661-922-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2021-02-18 661-545-0XXX 0000–0999Assigned METROPCS, INC. 5562 DELANO CA
2021-02-17 661-509-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2021-02-17 661-509-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2021-02-17 661-624-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2021-02-16 661-627-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-02-16 661-627-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-02-11 661-292-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SHAFTER CA
2021-02-11 661-292-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SHAFTER CA
2021-02-11 661-955-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-02-11 661-955-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-02-11 661-955-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-02-05 661-443-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C WALKERBSIN CA
2021-02-05 661-443-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C WALKERBSIN CA
2021-02-05 661-551-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BERENDMESA CA
2021-02-05 661-749-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MOJAVE CA
2021-02-05 661-749-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MOJAVE CA
2021-02-05 661-955-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ARVIN CA
2021-02-05 661-955-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ARVIN CA
2021-02-03 661-660-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SNCA SGCC CA
2021-02-03 661-660-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SNCA SGCC CA
2021-02-03 661-660-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H SNCA SGCC CA
2021-02-03 661-660-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SNCA SGCC CA
2021-02-02 661-344-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C EARLIMART CA
2021-02-02 661-344-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C EARLIMART CA
2021-02-02 661-453-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CLFRNHTSPG CA
2021-02-02 661-453-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CLFRNHTSPG CA
2021-02-02 661-518-0XXX 0000–0999Assigned TELNYX LLC 073H TEHACHAPI CA
2021-02-02 661-591-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C GLENNVILLE CA
2021-02-02 661-591-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C GLENNVILLE CA
2021-02-02 661-761-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MCKITTRICK CA
2021-02-02 661-761-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MCKITTRICK CA
2021-02-01 661-271-4XXX 4000–4999Assigned TELNYX LLC 073H MOJAVE CA
2021-01-28 661-669-1XXX 1000–1999Assigned TELNYX LLC 073H BIG BUTTE CA
2021-01-27 661-502-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SNCA NHCS CA
2021-01-27 661-502-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SNCA NHCS CA
2021-01-27 661-502-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SNCA NHCS CA
2021-01-26 661-469-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BUTTONWLLW CA
2021-01-21 661-922-2XXX 2000–2999Assigned FRACTEL, LLC 965H DELANO CA
2021-01-15 661-749-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MOJAVE CA
2021-01-15 661-770-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TAFT CA
2020-12-21 661-499-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2020-12-14 661-516-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-12-14 661-516-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 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.