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
2019-06-19 628-266-6XXX 6000–6999Assigned FRACTEL, LLC 965H CORTEMADRA CA
2019-06-19 628-288-6XXX 6000–6999Assigned FRACTEL, LLC 965H MILLVALLEY CA
2019-06-19 628-336-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2019-06-19 628-433-3XXX 3000–3999Assigned FRACTEL, LLC 965H IGNACIO CA
2019-06-14 628-758-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2019-06-05 628-336-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2019-06-04 628-336-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2019-05-20 628-465-8XXX 8000–8999Assigned FRACTEL, LLC 965H SAUSALITO CA
2019-05-20 628-529-3XXX 3000–3999Assigned FRACTEL, LLC 965H SNFC JUNPR CA
2019-05-20 628-529-9XXX 9000–9999Assigned FRACTEL, LLC 965H SNFC JUNPR CA
2019-05-17 628-280-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2019-05-15 628-270-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-05-15 628-270-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-05-15 628-270-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-05-15 628-270-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-05-03 628-363-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2019-05-01 628-260-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-04-26 628-261-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAUSALITO CA
2019-04-16 628-261-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J SAUSALITO CA
2019-04-11 628-336-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN RAFAEL CA
2019-04-04 628-629-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-03-19 628-288-8XXX 8000–8999Assigned FRACTEL, LLC 965H MILLVALLEY CA
2019-03-19 628-336-8XXX 8000–8999Assigned FRACTEL, LLC 965H SAN RAFAEL CA
2019-03-19 628-628-2XXX 2000–2999Assigned FRACTEL, LLC 965H SNFC CNTRL CA
2019-03-19 628-628-8XXX 8000–8999Assigned FRACTEL, LLC 965H SNFC CNTRL CA
2019-03-19 628-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H SNFC MT-EV CA
2019-03-15 628-629-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-03-15 628-629-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-03-15 628-629-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-03-12 628-266-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2019-03-12 628-266-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2019-03-12 628-433-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2019-03-12 628-433-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2019-03-12 628-433-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2019-03-07 628-212-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2019-03-07 628-212-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2019-03-07 628-259-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2019-03-07 628-259-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2019-02-26 628-250-9XXX 9000–9999Assigned SONIC TELECOM, LLC - CA 433E SNFC JUNPR CA
2019-02-26 628-280-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2019-02-25 628-258-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICASIO CA
2019-02-20 628-629-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-02-19 628-261-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2019-02-19 628-261-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2019-02-19 628-261-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2019-02-19 628-261-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2019-02-19 628-261-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAUSALITO CA
2019-02-12 628-214-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C NOVATO CA
2019-02-12 628-214-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C NOVATO CA
2019-02-12 628-259-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C IGNACIO 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.