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
2016-04-01 628-202-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2016-03-29 628-226-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2016-03-29 628-226-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2016-03-28 628-899-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-03-28 628-899-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-03-28 628-899-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-03-23 628-226-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2016-03-23 628-226-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2016-03-23 628-232-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2016-03-23 628-232-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2016-03-23 628-237-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2016-03-23 628-237-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2016-03-23 628-237-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2016-03-23 628-666-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2016-03-23 628-666-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2016-03-18 628-899-6XXX 6000–6999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2016-03-18 628-899-8XXX 8000–8999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2016-03-08 628-243-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2016-03-08 628-243-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2016-03-07 628-228-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2016-03-07 628-236-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NOVATO CA
2016-03-04 628-237-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAUSALITO CA
2016-02-29 628-899-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2016-02-25 628-226-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BELVEDERE CA
2016-02-25 628-666-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F IGNACIO CA
2016-02-18 628-228-2XXX 2000–2999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2016-02-18 628-228-3XXX 3000–3999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2016-02-16 628-227-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-02-16 628-666-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2016-02-16 628-777-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2016-02-16 628-877-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-02-16 628-877-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2016-02-12 628-220-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2016-02-12 628-220-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2016-02-12 628-220-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2016-02-12 628-226-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2016-02-12 628-226-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2016-02-12 628-232-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2016-02-12 628-232-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2016-02-12 628-666-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2016-02-12 628-666-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2016-02-04 628-236-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NOVATO CA
2016-01-28 628-232-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2016-01-28 628-232-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2016-01-20 628-235-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-01-15 628-201-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2016-01-08 628-235-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-01-08 628-235-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-01-08 628-235-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-01-08 628-235-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 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.