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
2019-09-06 628-758-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-08-30 628-268-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-30 628-268-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-30 628-268-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-30 628-268-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-30 628-268-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-29 628-268-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2019-08-26 628-268-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-08-26 628-268-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-08-26 628-529-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2019-08-14 628-288-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILLVALLEY CA
2019-08-08 628-336-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2019-08-08 628-336-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2019-08-05 628-628-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-05 628-628-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-05 628-628-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-05 628-628-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-08-05 628-628-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-07-25 628-628-3XXX 3000–3999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2019-07-24 628-267-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2019-07-18 628-628-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2019-07-18 628-758-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2019-07-12 628-529-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2019-07-09 628-202-8XXX 8000–8999Assigned TELNYX LLC 073H BELVEDERE CA
2019-07-08 628-262-0XXX 0000–0999Assigned VOIP INNOVATIONS, LLC 597F BELVEDERE CA
2019-07-08 628-628-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F SNFC CNTRL CA
2019-07-03 628-363-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2019-07-03 628-363-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2019-07-02 628-214-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C NOVATO CA
2019-07-02 628-214-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C NOVATO CA
2019-07-02 628-266-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2019-07-02 628-266-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2019-07-02 628-465-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2019-07-02 628-465-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2019-07-02 628-561-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2019-07-02 628-561-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2019-07-01 628-258-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C NICASIO CA
2019-07-01 628-258-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C NICASIO CA
2019-07-01 628-262-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2019-07-01 628-262-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2019-07-01 628-265-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2019-07-01 628-265-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2019-07-01 628-288-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2019-07-01 628-433-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2019-07-01 628-433-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2019-06-28 628-336-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SAN RAFAEL CA
2019-06-28 628-336-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SAN RAFAEL CA
2019-06-28 628-336-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SAN RAFAEL CA
2019-06-26 628-260-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-06-21 628-250-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR 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.