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
2021-04-13 661-851-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C EARLIMART CA
2021-04-12 661-504-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-04-12 661-504-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-04-12 661-844-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-04-12 661-844-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-04-09 661-627-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-04-09 661-627-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-04-08 661-934-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J ARVIN CA
2021-04-06 661-516-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD MAIN CA
2021-03-30 661-386-3XXX 3000–3999Assigned FRACTEL, LLC 965H ROSAMOND CA
2021-03-30 661-582-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J LANCASTER CA
2021-03-30 661-843-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2021-03-29 661-655-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-03-29 661-655-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-03-29 661-655-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-03-29 661-770-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TAFT CA
2021-03-26 661-541-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2021-03-26 661-541-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2021-03-26 661-541-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2021-03-24 661-386-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROSAMOND CA
2021-03-22 661-840-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-22 661-840-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-22 661-840-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-22 661-840-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-22 661-840-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-17 661-506-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-03-17 661-506-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-03-17 661-677-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-03-17 661-677-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD NORTH CA
2021-03-17 661-899-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2021-03-17 661-899-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2021-03-16 661-955-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2021-03-16 661-955-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2021-03-15 661-866-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2021-03-09 661-516-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2021-03-09 661-516-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2021-03-09 661-624-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD SOUTH CA
2021-03-09 661-624-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD SOUTH CA
2021-03-09 661-955-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2021-03-05 661-744-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-03-05 661-744-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-03-05 661-744-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2021-03-05 661-764-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BUTTONWLLW CA
2021-03-01 661-866-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-01 661-866-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-01 661-866-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-01 661-866-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-01 661-866-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-01 661-866-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-03-01 661-866-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 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.