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
2021-06-24 661-884-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C WASCO CA
2021-06-08 661-293-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TAFT CA
2021-06-08 661-293-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TAFT CA
2021-06-07 661-887-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-06-07 661-887-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-06-07 661-887-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-06-07 661-887-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-06-07 661-887-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-05-19 661-624-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2021-05-19 661-624-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2021-05-17 661-636-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-05-17 661-636-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-05-17 661-636-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-05-17 661-636-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-05-17 661-636-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-05-17 661-638-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-05-16 661-499-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2021-05-16 661-499-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2021-05-16 661-934-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-05-16 661-934-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-05-16 661-934-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-05-16 661-934-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-05-10 661-884-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WASCO CA
2021-05-09 661-213-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-05-09 661-218-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-05-09 661-514-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2021-05-09 661-615-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-05-09 661-677-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-05-09 661-677-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-05-09 661-677-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-05-09 661-745-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TAFT CA
2021-05-08 661-745-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TAFT CA
2021-05-04 661-584-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MOJAVE CA
2021-04-30 661-508-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-30 661-508-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-28 661-504-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-28 661-844-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-04-16 661-518-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2021-04-13 661-514-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MCFARLAND CA
2021-04-13 661-514-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MCFARLAND CA
2021-04-13 661-840-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BKFD MAIN CA
2021-04-13 661-851-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C EARLIMART 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.