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
2004-12-28 925-265-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CONCORD CA
2004-12-28 925-337-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2004-12-28 925-344-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2004-12-20 925-301-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2004-12-20 925-695-5XXX 5000–5999Assigned METROPCS, INC. 5562 CONCORD CA
2004-12-20 925-922-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2004-12-15 925-234-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANTIOCH CA
2004-12-15 925-237-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANTIOCH CA
2004-12-14 925-394-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BSHP RNCH CA
2004-12-10 925-270-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CONCORD CA
2004-12-10 925-271-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2004-12-10 925-392-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ECONTRCOST CA
2004-12-02 925-203-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PITTSBURG CA
2004-12-02 925-235-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MORAGA CA
2004-11-19 925-297-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAFAYETTE CA
2004-10-28 925-300-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2004-10-28 925-305-5XXX 5000–5999Assigned METROPCS, INC. 5562 CONCORD CA
2004-10-18 925-300-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2004-10-07 925-231-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MARTINEZ CA
2004-09-30 925-235-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORAGA CA
2004-09-23 925-305-6XXX 6000–6999Assigned METROPCS, INC. 5562 CONCORD CA
2004-09-14 925-727-1XXX 1000–1999Assigned METROPCS, INC. 5562 ANTIOCH CA
2004-09-14 925-727-4XXX 4000–4999Assigned METROPCS, INC. 5562 ANTIOCH CA
2004-08-31 925-317-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ORINDA CA
2004-08-31 925-317-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ORINDA CA
2004-08-31 925-852-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD CA
2004-08-31 925-956-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALNUT CRK CA
2004-08-25 925-300-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALNUT CRK CA
2004-08-25 925-566-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD CA
2004-08-19 925-237-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2004-08-19 925-237-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2004-08-19 925-558-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DUBLN-SNRM CA
2004-08-11 925-435-4XXX 4000–4999Assigned METROPCS, INC. 5562 CONCORD CA
2004-08-11 925-435-5XXX 5000–5999Assigned METROPCS, INC. 5562 CONCORD CA
2004-08-11 925-435-6XXX 6000–6999Assigned METROPCS, INC. 5562 CONCORD CA
2004-08-11 925-435-7XXX 7000–7999Assigned METROPCS, INC. 5562 CONCORD CA
2004-08-11 925-435-8XXX 8000–8999Assigned METROPCS, INC. 5562 CONCORD CA
2004-08-11 925-435-9XXX 9000–9999Assigned METROPCS, INC. 5562 CONCORD CA
2004-07-12 925-290-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 LIVERMORE CA
2004-07-06 925-395-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2004-07-01 925-395-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT CRK CA
2004-06-24 925-301-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANTIOCH CA
2004-06-22 925-262-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2004-06-07 925-726-5XXX 5000–5999Assigned METROPCS, INC. 5562 CONCORD CA
2004-05-27 925-301-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANTIOCH CA
2004-05-24 925-809-7XXX 7000–7999Assigned PACIFIC BELL 9740 ECONTRCOST CA
2004-04-28 925-726-6XXX 6000–6999Assigned METROPCS, INC. 5562 CONCORD CA
2004-04-07 925-395-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C WALNUT CRK CA
2004-03-16 925-297-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LAFAYETTE CA
2004-03-16 925-304-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CLAYTON 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.