NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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
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
2014-05-21 661-446-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C DELANO CA
2014-05-21 661-695-6XXX 6000–6999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD NORTH CA
2014-05-14 661-440-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2014-05-14 661-440-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2014-05-14 661-489-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2014-05-14 661-941-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2014-05-14 661-941-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2014-05-09 661-232-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MOJAVE CA
2014-05-08 661-556-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2014-05-07 661-372-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K DELANO CA
2014-05-07 661-426-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2014-05-07 661-426-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2014-05-07 661-440-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2014-05-07 661-440-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2014-05-07 661-440-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD MAIN CA
2014-05-07 661-520-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD MAIN CA
2014-05-07 661-520-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD MAIN CA
2014-05-06 661-261-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 BIG BUTTE CA
2014-05-06 661-941-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2014-04-30 661-489-4XXX 4000–4999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD MAIN CA
2014-04-29 661-247-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ARVIN CA
2014-04-29 661-339-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HI VISTA CA
2014-04-28 661-556-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BKFD SOUTH CA
2014-04-25 661-493-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2014-04-22 661-489-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2014-04-22 661-489-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2014-04-21 661-440-0XXX 0000–0999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2014-04-21 661-440-9XXX 9000–9999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2014-04-18 661-941-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K LANCASTER CA
2014-04-16 661-372-1XXX 1000–1999Assigned METROPCS, INC. 5562 DELANO CA
2014-04-14 661-372-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2014-04-14 661-410-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD NORTH CA
2014-04-10 661-372-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DELANO CA
2014-04-10 661-471-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K LANCASTER CA
2014-04-07 661-372-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DELANO CA
2014-04-04 661-425-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNCA NHCS CA
2014-04-03 661-770-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TAFT CA
2014-04-02 661-237-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SHAFTER CA
2014-04-02 661-239-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WALKERBSIN CA
2014-04-02 661-306-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEHUGHES CA
2014-04-02 661-622-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLDL LNVY CA
2014-04-02 661-750-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEHACHAPI CA
2014-04-02 661-750-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TEHACHAPI CA
2014-04-02 661-927-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MCFARLAND CA
2014-04-01 661-221-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MOJAVE CA
2014-04-01 661-410-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD NORTH CA
2014-04-01 661-556-4XXX 4000–4999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD SOUTH CA
2014-04-01 661-615-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BKFD NORTH CA
2014-04-01 661-771-7XXX 7000–7999Assigned BHN IP ENABLED SERVICES, LLC 045L TEHACHAPI CA
2014-03-31 661-425-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA NHCS 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.