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
2019-12-19 661-215-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD NORTH CA
2019-12-18 661-394-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD MAIN CA
2019-12-13 661-630-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHAFTER CA
2019-12-13 661-910-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHAFTER CA
2019-12-12 661-566-6XXX 6000–6999Assigned FRACTEL, LLC 965H PLDL PLDL CA
2019-12-02 661-888-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNCA NHCS CA
2019-11-22 661-451-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2019-11-22 661-566-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2019-11-22 661-566-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2019-11-22 661-566-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2019-11-22 661-566-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2019-11-22 661-566-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2019-11-19 661-704-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MCKITTRICK CA
2019-11-14 661-749-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MOJAVE CA
2019-10-30 661-484-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2019-10-30 661-484-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2019-10-30 661-484-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2019-10-11 661-884-0XXX 0000–0999Assigned TELNYX LLC 073H WASCO CA
2019-10-07 661-336-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2019-10-07 661-336-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2019-10-07 661-888-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNCA NHCS CA
2019-10-04 661-884-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C WASCO CA
2019-10-03 661-541-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2019-10-03 661-541-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2019-09-30 661-300-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEHACHAPI CA
2019-09-30 661-300-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEHACHAPI CA
2019-09-27 661-786-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNCA SGCC CA
2019-09-26 661-416-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2019-09-26 661-888-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2019-09-17 661-690-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C DELANO CA
2019-09-03 661-416-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2019-08-26 661-416-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2019-08-22 661-638-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2019-08-15 661-667-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2019-08-15 661-863-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2019-08-14 661-407-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2019-08-14 661-407-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2019-08-14 661-475-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C EDWARDS CA
2019-08-14 661-584-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MOJAVE CA
2019-08-14 661-584-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MOJAVE CA
2019-08-13 661-542-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2019-08-13 661-786-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2019-08-13 661-899-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2019-08-13 661-899-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2019-08-05 661-637-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2019-08-05 661-637-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2019-08-05 661-638-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2019-07-12 661-690-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2019-07-05 661-899-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2019-07-02 661-669-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BIG BUTTE 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.