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
2008-02-25 661-374-4XXX 4000–4999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD MAIN CA
2008-02-15 661-240-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WASCO CA
2008-02-15 661-458-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2008-02-08 661-368-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD NORTH CA
2008-02-08 661-371-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2008-02-08 661-371-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2008-02-05 661-306-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LAKEHUGHES CA
2008-01-30 661-836-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD SOUTH CA
2008-01-25 661-200-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA NHCS CA
2008-01-23 661-735-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD SOUTH CA
2008-01-22 661-369-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD MAIN CA
2008-01-22 661-369-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD MAIN CA
2008-01-21 661-241-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD SOUTH CA
2008-01-21 661-241-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD SOUTH CA
2008-01-21 661-262-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LAKEHUGHES CA
2008-01-21 661-802-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LANCASTER CA
2008-01-04 661-886-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2008-01-04 661-902-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2008-01-03 661-200-2XXX 2000–2999Assigned PACIFIC BELL 9740 SNCA NHCS CA
2008-01-03 661-341-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2008-01-03 661-341-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2007-12-26 661-374-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2007-12-21 661-348-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2007-12-20 661-346-2XXX 2000–2999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-4XXX 4000–4999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-6XXX 6000–6999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-7XXX 7000–7999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-8XXX 8000–8999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-346-9XXX 9000–9999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-369-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-20 661-369-4XXX 4000–4999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-12-13 661-910-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHAFTER CA
2007-12-07 661-247-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2007-12-05 661-709-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2007-12-05 661-709-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2007-11-28 661-200-1XXX 1000–1999Assigned PACIFIC BELL 9740 SNCA NHCS CA
2007-11-12 661-857-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2007-11-12 661-998-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2007-11-09 661-454-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DELANO CA
2007-10-31 661-949-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J LANCASTER CA
2007-10-23 661-754-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOJAVE CA
2007-10-22 661-348-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2007-10-22 661-348-1XXX 1000–1999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-10-22 661-348-2XXX 2000–2999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-10-22 661-348-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-10-22 661-348-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-10-22 661-348-6XXX 6000–6999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-10-22 661-348-7XXX 7000–7999Assigned METROPCS, INC. 5562 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.