NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

26 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 15
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
2014-10-03 925-875-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DUBLN-SNRM CA
2014-10-02 925-278-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2014-10-02 925-471-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CONCORD CA
2014-10-02 925-621-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2014-10-02 925-807-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BSHP RNCH CA
2014-10-02 925-807-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BSHP RNCH CA
2014-10-02 925-900-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LAFAYETTE CA
2014-10-02 925-900-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LAFAYETTE CA
2014-10-02 925-918-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2014-09-30 925-854-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DANVILLE CA
2014-09-30 925-854-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DANVILLE CA
2014-09-29 925-915-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2014-09-26 925-404-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2014-09-25 925-418-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ECONTRCOST CA
2014-09-23 925-587-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DUBLN-SNRM CA
2014-09-23 925-587-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DUBLN-SNRM CA
2014-09-22 925-420-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ECONTRCOST CA
2014-09-18 925-448-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2014-09-18 925-471-0XXX 0000–0999Assigned ASTOUND BROADBAND, LLC - CA 485E CONCORD CA
2014-09-17 925-329-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2014-09-17 925-329-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2014-09-17 925-329-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2014-09-12 925-528-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ORINDA CA
2014-09-12 925-528-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ORINDA CA
2014-09-10 925-329-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2014-09-04 925-448-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2014-09-03 925-481-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ANTIOCH CA
2014-08-29 925-353-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2014-08-29 925-403-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LAFAYETTE CA
2014-08-29 925-643-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PSBG WEST CA
2014-08-29 925-724-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2014-08-29 925-905-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C DUBLN-SNRM CA
2014-08-29 925-964-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2014-08-18 925-481-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2014-08-18 925-490-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2014-08-18 925-490-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2014-08-18 925-490-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2014-08-13 925-690-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CLAYTON CA
2014-08-11 925-448-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2014-08-11 925-490-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2014-07-24 925-448-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2014-07-23 925-344-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2014-07-21 925-448-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2014-07-21 925-481-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2014-07-21 925-490-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2014-07-21 925-490-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2014-07-21 925-583-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2014-07-21 925-724-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2014-07-17 925-448-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L WALNUT CRK CA
2014-07-17 925-481-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ANTIOCH CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.