NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 628
EXIANT COMMUNICATIONS LLC 3
ONVOY, LLC - CA 2
TELNYX LLC 1
OPENTACT 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
2016-09-14 628-245-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2016-09-14 628-245-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2016-09-14 628-245-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2016-09-14 628-245-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLVALLEY CA
2016-09-14 628-252-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2016-09-14 628-252-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2016-09-14 628-252-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2016-09-14 628-252-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2016-09-13 628-244-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BELVEDERE CA
2016-09-13 628-252-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CORTEMADRA CA
2016-09-08 628-207-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-09-08 628-207-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-09-08 628-207-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-09-06 628-201-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2016-09-06 628-207-7XXX 7000–7999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2016-09-01 628-245-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILLVALLEY CA
2016-08-30 628-207-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2016-08-29 628-253-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL CA
2016-08-29 628-254-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAUSALITO CA
2016-08-26 628-245-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MILLVALLEY CA
2016-08-26 628-254-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAUSALITO CA
2016-08-25 628-203-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2016-08-25 628-203-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2016-08-25 628-203-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2016-08-25 628-203-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E STNSN-BLNS CA
2016-08-24 628-207-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2016-08-24 628-241-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC JUNPR CA
2016-08-23 628-254-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2016-08-22 628-217-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-08-22 628-217-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-08-22 628-217-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-08-22 628-217-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-08-22 628-217-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-08-22 628-244-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BELVEDERE CA
2016-08-22 628-252-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CORTEMADRA CA
2016-08-18 628-237-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2016-08-18 628-237-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2016-08-17 628-253-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2016-08-16 628-201-8XXX 8000–8999Assigned IP HORIZON LLC 515J SNFC CNTRL CA
2016-08-16 628-207-3XXX 3000–3999Assigned IP HORIZON LLC 515J SNFC MT-EV CA
2016-08-16 628-229-6XXX 6000–6999Assigned IP HORIZON LLC 515J POINTREYES CA
2016-08-16 628-237-5XXX 5000–5999Assigned IP HORIZON LLC 515J SAUSALITO CA
2016-08-16 628-238-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2016-08-16 628-238-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2016-08-16 628-238-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2016-08-16 628-238-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2016-08-16 628-239-6XXX 6000–6999Assigned IP HORIZON LLC 515J SNFC JUNPR CA
2016-08-15 628-202-1XXX 1000–1999Assigned IP HORIZON LLC 515J BELVEDERE CA
2016-08-15 628-204-0XXX 0000–0999Assigned IP HORIZON LLC 515J NICASIO CA
2016-08-15 628-205-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL 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.