NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

18 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2023-03-10 661-604-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2023-03-10 661-701-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 661-701-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-02 661-602-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BKFD SOUTH CA
2023-03-02 661-602-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BKFD SOUTH CA
2023-03-02 661-603-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H PLDL PLDL CA
2023-03-02 661-603-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H PLDL PLDL CA
2023-02-21 661-339-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J HI VISTA CA
2023-02-17 661-604-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2023-02-17 661-604-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2023-02-17 661-604-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2023-02-10 661-596-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-02-10 661-596-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-02-10 661-596-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-02-10 661-596-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-02-10 661-596-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2023-02-10 661-603-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2023-02-10 661-603-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2023-02-10 661-603-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2023-01-31 661-213-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2023-01-30 661-598-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-01-30 661-598-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-01-30 661-598-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-01-30 661-598-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-01-20 661-596-1XXX 1000–1999Assigned NUSO, LLC 732J BKFD MAIN CA
2023-01-13 661-531-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2023-01-06 661-601-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-06 661-933-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-06 661-933-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-06 661-933-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-06 661-933-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-06 661-933-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-06 661-933-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2023-01-04 661-602-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2023-01-04 661-602-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2023-01-04 661-602-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2022-12-16 661-777-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEBEC CA
2022-12-05 661-899-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2022-11-23 661-651-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2022-11-22 661-430-7XXX 7000–7999Assigned TELNYX LLC 073H SNCA SGCC CA
2022-11-22 661-475-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C EDWARDS CA
2022-11-15 661-601-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.