NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

35 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 925
ONVOY, LLC - CA 24
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 5
BANDWIDTH.COM CLEC, LLC - CA 2
TELNYX LLC 1
T-MOBILE USA, INC. 1
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
2016-08-16 925-434-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ANTIOCH CA
2016-08-15 925-517-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PSBG WEST CA
2016-08-15 925-690-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CLAYTON CA
2016-08-10 925-369-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MARTINEZ CA
2016-08-08 925-375-7XXX 7000–7999Assigned METROPCS, INC. 5562 CONCORD CA
2016-08-08 925-375-8XXX 8000–8999Assigned METROPCS, INC. 5562 CONCORD CA
2016-08-08 925-495-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2016-08-03 925-235-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORAGA CA
2016-08-02 925-375-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2016-08-02 925-495-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LIVERMORE CA
2016-08-02 925-495-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LIVERMORE CA
2016-07-26 925-266-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2016-07-15 925-266-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2016-07-15 925-266-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2016-07-13 925-266-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2016-07-13 925-266-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2016-07-13 925-860-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SUNOL CA
2016-07-12 925-434-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-07-12 925-434-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-07-12 925-434-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-07-11 925-204-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2016-07-05 925-257-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORINDA CA
2016-07-01 925-375-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2016-06-30 925-520-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2016-06-29 925-725-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DANVILLE CA
2016-06-27 925-390-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ECONTRCOST CA
2016-06-27 925-453-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2016-06-24 925-690-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CLAYTON CA
2016-06-20 925-267-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C PITTSBURG CA
2016-06-15 925-444-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAFAYETTE CA
2016-06-14 925-494-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2016-06-14 925-587-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DUBLN-SNRM CA
2016-06-14 925-623-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASANTON CA
2016-06-13 925-266-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WALNUT CRK CA
2016-06-10 925-434-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2016-06-07 925-967-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DUBLN-SNRM CA
2016-06-03 925-316-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MARTINEZ CA
2016-05-25 925-494-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2016-05-25 925-494-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2016-05-19 925-968-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BSHP RNCH CA
2016-05-19 925-968-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BSHP RNCH CA
2016-05-18 925-960-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LIVERMORE CA
2016-05-13 925-500-6XXX 6000–6999Assigned HD CARRIER LLC 321J MARTINEZ CA
2016-05-13 925-500-7XXX 7000–7999Assigned HD CARRIER LLC 321J MARTINEZ CA
2016-05-13 925-500-9XXX 9000–9999Assigned HD CARRIER LLC 321J MARTINEZ CA
2016-05-13 925-723-5XXX 5000–5999Assigned HD CARRIER LLC 321J MARTINEZ CA
2016-05-13 925-723-6XXX 6000–6999Assigned HD CARRIER LLC 321J MARTINEZ CA
2016-05-02 925-266-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2016-05-02 925-266-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2016-05-02 925-266-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK 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.