NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 248-491

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 248-491 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 248 blocks

Most active assignees, all time — NPA 248
ONVOY SPECTRUM, LLC 2
METROPCS, INC. 2
BANDWIDTH.COM CLEC, LLC - MI 2
PAETEC ITEL, LLC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 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
2005-08-02 248-491-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J SOUTH LYON MI
2005-06-23 248-491-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 SOUTH LYON MI
2021-12-17 248-491-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SOUTH LYON MI
2010-01-22 248-491-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E SOUTH LYON MI
— 248-491-4XXX 4000–4999Available SOUTH LYON MI
2021-12-13 248-491-5XXX 5000–5999Assigned METROPCS, INC. 5562 SOUTH LYON MI
2021-12-13 248-491-6XXX 6000–6999Assigned METROPCS, INC. 5562 SOUTH LYON MI
— 248-491-7XXX 7000–7999Reserved LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTH LYON MI
2011-02-25 248-491-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E SOUTH LYON MI
2021-12-17 248-491-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SOUTH LYON 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.