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
2018-10-08 925-436-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ANTIOCH CA
2018-10-08 925-503-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2018-10-08 925-915-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2018-10-04 925-812-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MARTINEZ CA
2018-10-02 925-387-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARTINEZ CA
2018-10-02 925-409-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2018-09-28 925-532-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2018-09-18 925-503-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2018-09-04 925-431-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PITTSBURG CA
2018-08-29 925-387-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MARTINEZ CA
2018-08-23 925-542-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2018-07-31 925-404-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2018-07-23 925-510-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2018-07-23 925-510-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2018-07-23 925-510-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2018-07-23 925-510-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2018-07-20 925-249-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLEASANTON CA
2018-07-09 925-306-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ECONTRCOST CA
2018-07-09 925-460-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASANTON CA
2018-07-06 925-542-7XXX 7000–7999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H WALNUT CRK CA
2018-07-06 925-643-3XXX 3000–3999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H PSBG WEST CA
2018-07-06 925-694-9XXX 9000–9999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H PLEASANTON CA
2018-07-06 925-835-3XXX 3000–3999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H SUNOL CA
2018-07-03 925-306-3XXX 3000–3999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H ECONTRCOST CA
2018-07-03 925-365-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H BSHP RNCH CA
2018-07-03 925-409-9XXX 9000–9999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H LIVERMORE CA
2018-07-03 925-503-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H ANTIOCH CA
2018-07-03 925-510-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H CONCORD CA
2018-07-03 925-888-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H MORAGA CA
2018-07-03 925-900-7XXX 7000–7999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H LAFAYETTE CA
2018-07-03 925-917-7XXX 7000–7999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H MARTINEZ CA
2018-06-22 925-542-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2018-06-21 925-409-3XXX 3000–3999Assigned TELNYX LLC 073H LIVERMORE CA
2018-06-12 925-307-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 DUBLN-SNRM CA
2018-05-31 925-302-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BSHP RNCH CA
2018-05-30 925-503-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ANTIOCH CA
2018-05-30 925-510-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CONCORD CA
2018-05-16 925-701-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLEASANTON CA
2018-05-14 925-725-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DANVILLE CA
2018-04-27 925-965-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLEASANTON CA
2018-04-24 925-557-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2018-04-09 925-394-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BSHP RNCH CA
2018-04-04 925-436-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 ANTIOCH CA
2018-03-23 925-510-6XXX 6000–6999Assigned METROPCS, INC. 5562 CONCORD CA
2018-03-23 925-510-7XXX 7000–7999Assigned METROPCS, INC. 5562 CONCORD CA
2018-03-23 925-510-8XXX 8000–8999Assigned METROPCS, INC. 5562 CONCORD CA
2018-03-23 925-510-9XXX 9000–9999Assigned METROPCS, INC. 5562 CONCORD CA
2018-03-21 925-542-3XXX 3000–3999Assigned METROPCS, INC. 5562 WALNUT CRK CA
2018-03-20 925-536-5XXX 5000–5999Assigned METROPCS, INC. 5562 CONCORD CA
2018-03-16 925-259-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORINDA 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.