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
2020-09-30 661-584-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MOJAVE CA
2020-09-24 661-292-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SHAFTER CA
2020-09-23 661-512-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D PLDL AGDL CA
2020-09-21 661-506-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D PLDL PLDL CA
2020-09-21 661-744-4XXX 4000–4999Assigned FRACTEL, LLC 965H PLDL PLDL CA
2020-09-21 661-866-6XXX 6000–6999Assigned FRACTEL, LLC 965H BKFD MAIN CA
2020-09-20 661-623-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TAFT CA
2020-09-19 661-752-8XXX 8000–8999Assigned TELNYX LLC 073H ROSAMOND CA
2020-09-17 661-514-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2020-09-17 661-514-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2020-09-14 661-732-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-09-14 661-732-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-09-14 661-732-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-09-14 661-732-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DELANO CA
2020-09-09 661-506-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-09 661-506-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-09 661-506-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-09 661-506-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-04 661-504-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-04 661-504-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-04 661-504-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-01 661-300-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2020-08-25 661-655-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2020-08-25 661-655-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2020-08-20 661-732-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2020-08-19 661-732-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DELANO CA
2020-08-13 661-655-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARVIN CA
2020-08-11 661-541-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD MAIN CA
2020-08-11 661-688-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-08-11 661-688-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-08-11 661-688-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2020-08-11 661-788-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD SOUTH CA
2020-08-10 661-308-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2020-08-10 661-308-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2020-08-10 661-394-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2020-08-07 661-271-8XXX 8000–8999Assigned TELNYX LLC 073H MOJAVE CA
2020-08-05 661-504-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-08-05 661-504-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-08-05 661-504-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-08-05 661-504-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-31 661-484-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD SOUTH CA
2020-07-31 661-486-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PLDL AGDL CA
2020-07-31 661-503-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-31 661-503-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-31 661-503-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-31 661-503-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-31 661-503-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-31 661-503-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-07-30 661-669-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2020-07-30 661-669-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BIG BUTTE 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.