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
2016-06-30 628-233-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-06-28 628-236-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NOVATO CA
2016-06-28 628-666-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2016-06-28 628-666-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2016-06-27 628-203-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2016-06-27 628-203-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2016-06-24 628-243-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2016-06-24 628-243-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2016-06-22 628-225-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2016-06-22 628-225-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2016-06-22 628-227-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-06-22 628-227-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-06-21 628-777-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2016-06-21 628-777-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
2016-06-21 628-777-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2016-06-21 628-877-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-06-21 628-877-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-06-13 628-225-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2016-06-13 628-225-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2016-06-10 628-225-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-06-10 628-225-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-06-10 628-228-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-06-10 628-228-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-06-09 628-228-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2016-06-02 628-899-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-06-02 628-899-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-05-20 628-220-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-05-20 628-220-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-05-20 628-228-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-05-20 628-228-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-05-17 628-236-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2016-05-13 628-220-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SNFC CNTRL CA
2016-05-11 628-877-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2016-05-10 628-220-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-05-03 628-229-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F POINTREYES CA
2016-04-29 628-229-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2016-04-29 628-229-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2016-04-26 628-220-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-04-26 628-220-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-04-26 628-234-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2016-04-19 628-236-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO CA
2016-04-14 628-220-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2016-04-11 628-877-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-04-11 628-877-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-04-11 628-877-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-04-05 628-237-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2016-04-05 628-237-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2016-04-05 628-666-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2016-04-05 628-877-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-04-05 628-877-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CORTEMADRA 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.