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
2019-08-07 925-725-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DANVILLE CA
2019-08-06 925-534-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-06 925-534-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-05 925-477-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-08-05 925-503-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-08-05 925-503-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-08-05 925-549-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-07-31 925-488-7XXX 7000–7999Assigned METROPCS, INC. 5562 WALNUT CRK CA
2019-07-12 925-488-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2019-07-10 925-558-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-07-10 925-558-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-07-08 925-233-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUNOL CA
2019-06-24 925-488-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WALNUT CRK CA
2019-06-21 925-477-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANTIOCH CA
2019-06-21 925-730-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2019-06-21 925-860-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SUNOL CA
2019-06-14 925-922-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLEASANTON CA
2019-06-13 925-248-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-06-13 925-248-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-06-13 925-302-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BSHP RNCH CA
2019-06-13 925-307-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-06-13 925-359-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BSHP RNCH CA
2019-06-06 925-409-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2019-06-06 925-819-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DUBLN-SNRM CA
2019-05-30 925-655-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2019-05-30 925-655-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2019-05-24 925-856-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2019-05-15 925-306-6XXX 6000–6999Assigned SONIC TELECOM, LLC - CA 433E ECONTRCOST CA
2019-05-15 925-655-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD CA
2019-05-06 925-758-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVERMORE CA
2019-04-30 925-655-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CONCORD CA
2019-04-30 925-655-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CONCORD CA
2019-04-30 925-655-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CONCORD CA
2019-04-30 925-655-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CONCORD CA
2019-04-30 925-655-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CONCORD CA
2019-04-29 925-603-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CONCORD CA
2019-04-15 925-477-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-04-15 925-477-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-04-15 925-623-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2019-04-11 925-403-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LAFAYETTE CA
2019-04-11 925-406-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DANVILLE CA
2019-04-04 925-440-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK 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.