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
2019-06-28 661-863-2XXX 2000–2999Assigned PACIFIC BELL 9740 BKFD MAIN CA
2019-06-28 661-863-3XXX 3000–3999Assigned PACIFIC BELL 9740 BKFD MAIN CA
2019-06-28 661-863-4XXX 4000–4999Assigned PACIFIC BELL 9740 BKFD MAIN CA
2019-06-28 661-863-5XXX 5000–5999Assigned PACIFIC BELL 9740 BKFD MAIN CA
2019-06-20 661-668-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EARLIMART CA
2019-06-19 661-566-5XXX 5000–5999Assigned FRACTEL, LLC 965H PLDL PLDL CA
2019-05-31 661-899-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2019-05-17 661-425-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2019-05-16 661-690-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C DELANO CA
2019-05-16 661-690-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C DELANO CA
2019-05-16 661-690-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C DELANO CA
2019-05-16 661-690-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DELANO CA
2019-05-15 661-261-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BIG BUTTE CA
2019-05-14 661-786-7XXX 7000–7999Assigned FRACTEL, LLC 965H SNCA SGCC CA
2019-05-14 661-899-9XXX 9000–9999Assigned FRACTEL, LLC 965H LANCASTER CA
2019-04-30 661-501-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2019-04-30 661-501-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2019-04-29 661-593-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNCA NHCS CA
2019-04-12 661-407-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J BKFD MAIN CA
2019-04-12 661-451-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ARVIN CA
2019-04-12 661-690-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2019-04-11 661-336-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2019-03-28 661-300-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2019-03-27 661-338-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2019-03-27 661-724-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2019-03-19 661-566-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2019-03-15 661-441-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2019-03-13 661-486-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D PLDL AGDL CA
2019-02-27 661-409-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2019-02-27 661-409-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2019-02-27 661-485-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2019-02-27 661-485-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2019-02-25 661-405-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LANCASTER CA
2019-02-06 661-405-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2019-02-06 661-405-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2019-02-06 661-405-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2019-02-06 661-405-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2019-02-06 661-417-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2019-02-06 661-417-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2019-02-06 661-495-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2019-02-06 661-495-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2019-02-05 661-515-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2019-02-05 661-515-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2019-02-05 661-724-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2019-02-05 661-724-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2019-02-01 661-462-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2019-02-01 661-462-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2019-02-01 661-780-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C PLDL LNVY CA
2019-02-01 661-780-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLDL LNVY CA
2019-01-31 661-486-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C PLDL AGDL 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.