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
2014-07-16 925-481-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2014-07-15 925-293-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C MARTINEZ CA
2014-07-09 925-490-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CONCORD CA
2014-07-09 925-664-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PSBG WEST CA
2014-07-09 925-809-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ECONTRCOST CA
2014-07-09 925-812-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MARTINEZ CA
2014-07-09 925-885-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORINDA CA
2014-07-09 925-888-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORAGA CA
2014-07-09 925-900-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LAFAYETTE CA
2014-07-09 925-968-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BSHP RNCH CA
2014-07-09 925-993-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLAYTON CA
2014-07-02 925-448-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2014-07-02 925-453-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LIVERMORE CA
2014-06-24 925-718-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DANVILLE CA
2014-06-20 925-587-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DUBLN-SNRM CA
2014-06-16 925-481-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ANTIOCH CA
2014-06-11 925-983-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 BSHP RNCH CA
2014-06-05 925-961-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVERMORE CA
2014-06-04 925-481-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2014-05-23 925-448-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WALNUT CRK CA
2014-05-23 925-490-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2014-05-23 925-490-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2014-05-23 925-490-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2014-05-20 925-326-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2014-05-20 925-326-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2014-05-20 925-750-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLEASANTON CA
2014-05-15 925-380-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BSHP RNCH CA
2014-05-13 925-794-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORAGA CA
2014-05-13 925-862-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SUNOL CA
2014-05-12 925-794-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MORAGA CA
2014-05-07 925-481-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2014-05-06 925-543-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 BSHP RNCH CA
2014-04-30 925-844-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLAYTON CA
2014-04-29 925-201-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLEASANTON CA
2014-04-28 925-448-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2014-04-10 925-892-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2014-04-04 925-239-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2014-04-04 925-350-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANTIOCH CA
2014-04-04 925-391-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2014-04-03 925-239-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2014-04-03 925-248-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DUBLN-SNRM CA
2014-03-24 925-278-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 WALNUT CRK CA
2014-03-24 925-481-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2014-03-24 925-701-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-03-24 925-701-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-03-24 925-701-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 PLEASANTON CA
2014-03-18 925-666-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ECONTRCOST CA
2014-03-17 925-391-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONCORD CA
2014-03-17 925-438-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ORINDA CA
2014-03-17 925-665-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PITTSBURG 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.