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
2015-02-18 925-317-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ORINDA CA
2015-02-18 925-378-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2015-02-05 925-900-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LAFAYETTE CA
2015-01-19 925-384-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2015-01-19 925-384-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2015-01-19 925-384-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANTIOCH CA
2015-01-13 925-378-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2015-01-08 925-378-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2014-12-31 925-643-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PSBG WEST CA
2014-12-12 925-378-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2014-12-05 925-384-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ANTIOCH CA
2014-11-26 925-420-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C ECONTRCOST CA
2014-11-26 925-666-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C ECONTRCOST CA
2014-11-26 925-800-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LIVERMORE CA
2014-11-26 925-800-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LIVERMORE CA
2014-11-26 925-809-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ECONTRCOST CA
2014-11-25 925-329-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ANTIOCH CA
2014-11-25 925-329-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ANTIOCH CA
2014-11-25 925-329-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ANTIOCH CA
2014-11-10 925-379-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-10 925-379-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-11-03 925-208-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2014-10-31 925-800-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LIVERMORE CA
2014-10-29 925-329-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2014-10-28 925-308-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ECONTRCOST CA
2014-10-28 925-308-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ECONTRCOST CA
2014-10-24 925-568-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SUNOL CA
2014-10-15 925-523-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2014-10-14 925-660-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLEASANTON CA
2014-10-14 925-794-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MORAGA CA
2014-10-14 925-860-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SUNOL CA
2014-10-07 925-608-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-07 925-608-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 MARTINEZ CA
2014-10-03 925-394-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BSHP RNCH CA
2014-10-03 925-471-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CONCORD CA
2014-10-03 925-471-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CONCORD 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.