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
2007-03-01 661-208-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2007-02-27 661-209-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C PLDL AGDL CA
2007-02-27 661-249-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2007-02-27 661-249-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K BIG BUTTE CA
2007-02-27 661-262-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2007-02-27 661-463-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2007-02-20 661-670-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D SNCA NHCS CA
2007-02-20 661-670-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D SNCA NHCS CA
2007-02-14 661-718-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2007-02-02 661-865-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-02-02 661-865-4XXX 4000–4999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-02-02 661-865-7XXX 7000–7999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-02-02 661-865-9XXX 9000–9999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-01-26 661-238-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2007-01-25 661-237-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SHAFTER CA
2007-01-25 661-932-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2007-01-17 661-208-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2007-01-17 661-208-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2007-01-17 661-208-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2007-01-17 661-208-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2007-01-12 661-335-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2007-01-12 661-335-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2007-01-12 661-852-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2007-01-12 661-865-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2007-01-12 661-865-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2007-01-12 661-865-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2007-01-12 661-902-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2007-01-12 661-902-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2007-01-11 661-247-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2007-01-09 661-865-1XXX 1000–1999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-01-09 661-865-2XXX 2000–2999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2007-01-05 661-874-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LANCASTER CA
2007-01-05 661-916-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2007-01-04 661-262-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LAKEHUGHES CA
2007-01-04 661-622-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL LNVY CA
2007-01-03 661-232-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MOJAVE CA
2006-12-27 661-526-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2006-12-27 661-869-7XXX 7000–7999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2006-12-20 661-753-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2006-12-11 661-869-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2006-12-07 661-695-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 BKFD NORTH CA
2006-12-07 661-910-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHAFTER CA
2006-12-05 661-206-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LANCASTER CA
2006-12-05 661-526-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL PLDL CA
2006-11-29 661-476-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2006-11-29 661-476-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2006-11-27 661-869-4XXX 4000–4999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2006-11-20 661-912-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2006-11-20 661-912-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2006-11-20 661-932-5XXX 5000–5999Assigned 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.