NumberResearchThousands-blocks in 616-577
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
The ten 1,000-number thousand-blocks inside prefix 616-577 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
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-08-27 | 616-577-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SARANAC | MI |
| 2009-11-06 | 616-577-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | SARANAC | MI |
| 2012-07-18 | 616-577-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | SARANAC | MI |
| 2014-06-06 | 616-577-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | SARANAC | MI |
| 2015-08-17 | 616-577-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SARANAC | MI |
| 2012-05-02 | 616-577-5XXX | 5000–5999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | SARANAC | MI |
| 2011-01-19 | 616-577-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SARANAC | MI |
| 2013-02-21 | 616-577-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | SARANAC | MI |
| 2014-06-24 | 616-577-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | SARANAC | MI |
| 2015-11-30 | 616-577-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | SARANAC | 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.