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
2012-12-04 661-249-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2012-12-04 661-306-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2012-12-04 661-306-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2012-12-04 661-402-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C PLDL AGDL CA
2012-12-04 661-673-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2012-12-04 661-673-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2012-12-04 661-977-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2012-11-29 661-230-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E EDWARDS CA
2012-11-19 661-434-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2012-11-16 661-666-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCA NHCS CA
2012-11-07 661-221-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MOJAVE CA
2012-11-06 661-448-1XXX 1000–1999Assigned NUSO, LLC 551G BKFD MAIN CA
2012-10-16 661-606-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 ARVIN CA
2012-10-16 661-768-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TAFT CA
2012-10-11 661-429-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2012-10-01 661-430-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA SGCC CA
2012-09-28 661-446-0XXX 0000–0999Assigned METROPCS, INC. 5562 DELANO CA
2012-09-28 661-446-1XXX 1000–1999Assigned METROPCS, INC. 5562 DELANO CA
2012-09-27 661-429-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2012-09-27 661-429-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2012-09-27 661-429-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2012-09-27 661-446-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2012-09-26 661-437-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2012-09-12 661-249-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BIG BUTTE CA
2012-09-10 661-621-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D SNCA SGCC CA
2012-09-10 661-679-6XXX 6000–6999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD NORTH CA
2012-08-30 661-432-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2012-08-28 661-437-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2012-08-28 661-437-6XXX 6000–6999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2012-08-28 661-437-7XXX 7000–7999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2012-08-28 661-437-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2012-08-24 661-529-4XXX 4000–4999Assigned PACIFIC BELL 9740 BKFD SOUTH CA
2012-08-16 661-772-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 WASCO CA
2012-08-13 661-377-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2012-08-13 661-637-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2012-08-09 661-529-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2012-08-09 661-529-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2012-08-09 661-529-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2012-08-09 661-529-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2012-08-09 661-902-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2012-08-08 661-446-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 DELANO CA
2012-08-03 661-214-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOST HILLS CA
2012-08-03 661-487-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2012-07-16 661-282-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2012-07-16 661-282-8XXX 8000–8999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD SOUTH CA
2012-07-16 661-367-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCA SGCC CA
2012-07-16 661-418-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LANCASTER CA
2012-07-16 661-434-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLDL PLDL CA
2012-07-16 661-434-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J PLDL PLDL CA
2012-07-16 661-679-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD NORTH 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.