NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 616-528

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 616-528 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 616 blocks

Most active assignees, all time — NPA 616
BANDWIDTH.COM CLEC, LLC - MI 3
TELEPORT COMMUNICATIONS AMERICA, LLC - MI 1
ONVOY, LLCV - MI 1
NEW CINGULAR WIRELESS PCS, LLC - IL 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
2009-02-05 616-528-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CALEDONIA MI
2004-11-10 616-528-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CALEDONIA MI
2009-08-27 616-528-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CALEDONIA MI
— 616-528-3XXX 3000–3999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 CALEDONIA MI
2010-01-25 616-528-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CALEDONIA MI
2010-07-28 616-528-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K CALEDONIA MI
2010-02-16 616-528-6XXX 6000–6999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L CALEDONIA MI
2008-09-08 616-528-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CALEDONIA MI
2011-03-16 616-528-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CALEDONIA MI
2012-04-27 616-528-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C CALEDONIA 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.