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
2013-08-26 661-780-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLDL LNVY CA
2013-08-14 661-426-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2013-08-06 661-432-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2013-08-06 661-432-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2013-08-06 661-432-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2013-08-05 661-432-7XXX 7000–7999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD MAIN CA
2013-08-05 661-454-6XXX 6000–6999Assigned BHN IP ENABLED SERVICES, LLC 045L DELANO CA
2013-08-05 661-735-8XXX 8000–8999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD SOUTH CA
2013-08-01 661-441-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D PLDL PLDL CA
2013-08-01 661-513-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA SGCC CA
2013-07-25 661-432-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2013-07-25 661-432-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2013-07-23 661-481-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA NHCS CA
2013-07-22 661-309-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA SGCC CA
2013-07-22 661-471-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LANCASTER CA
2013-07-15 661-214-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOST HILLS CA
2013-06-27 661-613-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EDWARDS CA
2013-06-11 661-436-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2013-06-10 661-360-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA SGCC CA
2013-06-10 661-441-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL PLDL CA
2013-06-10 661-441-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL PLDL CA
2013-06-10 661-941-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LANCASTER CA
2013-06-10 661-941-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LANCASTER CA
2013-05-29 661-432-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2013-05-09 661-429-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2013-05-09 661-429-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2013-05-09 661-446-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2013-05-09 661-471-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2013-05-09 661-557-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARVIN CA
2013-05-08 661-432-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2013-05-08 661-432-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2013-04-23 661-221-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MOJAVE CA
2013-04-15 661-448-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2013-04-15 661-448-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2013-04-15 661-448-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2013-04-15 661-473-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2013-04-15 661-473-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2013-04-08 661-429-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LANCASTER CA
2013-04-05 661-666-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2013-04-05 661-678-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCA NHCS CA
2013-04-01 661-606-7XXX 7000–7999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 ARVIN CA
2013-04-01 661-768-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TAFT CA
2013-03-28 661-446-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2013-03-20 661-471-4XXX 4000–4999Assigned PACIFIC BELL (COMPETITIVE) 7480 LANCASTER CA
2013-03-14 661-360-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA SGCC CA
2013-03-14 661-471-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LANCASTER CA
2013-03-14 661-471-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LANCASTER CA
2013-03-14 661-481-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA NHCS CA
2013-03-13 661-402-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL AGDL CA
2013-03-13 661-441-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL PLDL 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.