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
2013-08-21 925-320-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MORAGA CA
2013-08-21 925-453-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LIVERMORE CA
2013-08-21 925-993-9XXX 9000–9999Assigned ASTOUND BROADBAND, LLC - CA 485E CLAYTON CA
2013-08-20 925-239-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2013-08-20 925-464-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2013-08-14 925-359-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2013-08-06 925-239-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2013-07-24 925-316-6XXX 6000–6999Assigned ASTOUND BROADBAND, LLC - CA 485E MARTINEZ CA
2013-07-23 925-217-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DANVILLE CA
2013-07-18 925-298-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LAFAYETTE CA
2013-07-17 925-446-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CONCORD CA
2013-07-10 925-364-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DUBLN-SNRM CA
2013-07-08 925-428-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2013-07-08 925-665-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PITTSBURG CA
2013-07-08 925-961-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2013-07-02 925-428-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2013-06-28 925-549-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DUBLN-SNRM CA
2013-06-21 925-771-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2013-06-18 925-201-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASANTON CA
2013-06-07 925-239-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2013-06-07 925-239-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2013-06-06 925-315-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2013-06-03 925-475-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2013-05-29 925-290-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LIVERMORE CA
2013-05-29 925-406-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DANVILLE CA
2013-05-28 925-239-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2013-05-28 925-464-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WALNUT CRK CA
2013-05-28 925-701-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PLEASANTON CA
2013-05-23 925-316-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARTINEZ CA
2013-05-23 925-415-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BSHP RNCH CA
2013-05-23 925-583-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LIVERMORE CA
2013-05-23 925-678-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DANVILLE CA
2013-05-13 925-332-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2013-05-08 925-239-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2013-04-25 925-968-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2013-04-19 925-428-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2013-04-09 925-690-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLAYTON CA
2013-04-05 925-332-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2013-04-05 925-332-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2013-04-05 925-597-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PITTSBURG CA
2013-04-04 925-464-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2013-03-28 925-557-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2013-03-27 925-239-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WALNUT CRK CA
2013-03-27 925-239-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WALNUT CRK CA
2013-03-27 925-660-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2013-03-19 925-732-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ANTIOCH CA
2013-03-12 925-464-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2013-03-12 925-957-3XXX 3000–3999Assigned HD CARRIER LLC 321J MARTINEZ CA
2013-03-12 925-957-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MARTINEZ CA
2013-03-11 925-574-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DUBLN-SNRM 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.