NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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
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
2020-05-19 661-786-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNCA SGCC CA
2020-05-13 661-416-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARVIN CA
2020-05-13 661-484-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2020-05-13 661-484-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2020-05-13 661-484-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2020-05-13 661-484-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2020-05-13 661-776-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SHAFTER CA
2020-05-13 661-776-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SHAFTER CA
2020-05-12 661-669-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2020-04-23 661-561-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DELANO CA
2020-04-23 661-561-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DELANO CA
2020-04-16 661-308-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD MAIN CA
2020-04-15 661-749-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MOJAVE CA
2020-04-14 661-899-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2020-04-13 661-458-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MCFARLAND CA
2020-04-13 661-484-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2020-04-13 661-566-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLDL PLDL CA
2020-04-13 661-786-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNCA SGCC CA
2020-04-07 661-443-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C WALKERBSIN CA
2020-04-07 661-443-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C WALKERBSIN CA
2020-04-07 661-561-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2020-04-07 661-884-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C WASCO CA
2020-04-03 661-561-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2020-03-30 661-561-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-03-30 661-561-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-03-26 661-458-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2020-03-26 661-667-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2020-03-11 661-770-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TAFT CA
2020-03-10 661-677-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD NORTH CA
2020-02-26 661-902-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2020-02-18 661-315-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 661-315-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-13 661-308-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J BKFD MAIN CA
2020-02-03 661-300-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEHACHAPI CA
2020-02-03 661-300-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEHACHAPI CA
2020-01-24 661-451-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2020-01-14 661-690-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-01-14 661-690-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-01-10 661-484-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD SOUTH CA
2020-01-07 661-289-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEBEC CA
2020-01-02 661-677-7XXX 7000–7999Assigned FRACTEL, LLC 965H BKFD NORTH CA
2019-12-23 661-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H 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.