NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 313-825

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 313-825 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 313 blocks

Most active assignees, all time — NPA 313
ONVOY, LLCV - MI 3
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 3
BOOST SUBSCRIBERCO L.L.C. 2
TELEPORT COMMUNICATIONS AMERICA, LLC - MI 1
PAETEC ITEL, LLC 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
2026-03-05 313-825-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J DETROITZN2 MI
2007-05-09 313-825-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J DETROITZN2 MI
— 313-825-2XXX 2000–2999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN2 MI
2026-03-05 313-825-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J DETROITZN2 MI
2020-08-19 313-825-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2017-11-08 313-825-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2017-11-08 313-825-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2014-08-28 313-825-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-08-28 313-825-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2010-12-02 313-825-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI

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.