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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2006-01-05 661-269-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2006-01-05 661-269-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2005-12-28 661-877-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA NHCS CA
2005-12-28 661-877-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA NHCS CA
2005-12-21 661-219-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2005-12-20 661-214-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOST HILLS CA
2005-12-20 661-320-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LEBEC CA
2005-12-20 661-370-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C DELANO CA
2005-12-20 661-695-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2005-12-20 661-718-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2005-12-16 661-264-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2005-12-16 661-430-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2005-12-16 661-431-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2005-12-16 661-431-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2005-12-16 661-462-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2005-12-15 661-236-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2005-12-15 661-302-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2005-12-12 661-670-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2005-12-12 661-699-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2005-12-12 661-699-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2005-12-06 661-309-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D SNCA SGCC CA
2005-12-05 661-817-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2005-12-01 661-469-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 BUTTONWLLW CA
2005-11-30 661-236-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2005-11-30 661-302-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2005-11-30 661-839-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2005-11-30 661-839-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2005-11-23 661-387-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2005-11-23 661-679-9XXX 9000–9999Assigned METROPCS, INC. 5562 BKFD NORTH CA
2005-11-10 661-250-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNCA SGCC CA
2005-11-10 661-263-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNCA SGCC CA
2005-11-10 661-557-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARVIN CA
2005-11-10 661-912-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2005-11-10 661-912-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2005-11-09 661-772-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WASCO CA
2005-11-02 661-302-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2005-11-02 661-431-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2005-11-02 661-431-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2005-10-27 661-202-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2005-10-26 661-341-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LANCASTER CA
2005-10-20 661-778-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DELANO CA
2005-10-19 661-878-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLDL PLDL CA
2005-10-19 661-878-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLDL PLDL CA
2005-10-14 661-778-6XXX 6000–6999Assigned METROPCS, INC. 5562 DELANO CA
2005-10-10 661-431-6XXX 6000–6999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2005-10-07 661-450-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLDL AGDL CA
2005-10-07 661-452-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BERENDMESA CA
2005-10-03 661-316-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2005-09-26 661-964-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNCA NHCS CA
2005-09-26 661-977-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNCA SGCC 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.