NumberResearchThousands-blocks in 586-786
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 586-786 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 586 blocks
Most active assignees, all time — NPA 586
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 586-786-0XXX | 0000–0999 | Reserved | MICHIGAN BELL TEL CO | 9323 | WASHINGTON | MI |
| — | 586-786-1XXX | 1000–1999 | Reserved | MICHIGAN BELL TEL CO | 9323 | WASHINGTON | MI |
| 2009-10-21 | 586-786-2XXX | 2000–2999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | WASHINGTON | MI |
| 2020-11-18 | 586-786-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | WASHINGTON | MI |
| 2013-01-22 | 586-786-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | WASHINGTON | MI |
| — | 586-786-5XXX | 5000–5999 | Reserved | MICHIGAN BELL TEL CO | 9323 | WASHINGTON | MI |
| — | 586-786-6XXX | 6000–6999 | Reserved | MICHIGAN BELL TEL CO | 9323 | WASHINGTON | MI |
| — | 586-786-7XXX | 7000–7999 | Reserved | MICHIGAN BELL TEL CO | 9323 | WASHINGTON | MI |
| 2020-07-23 | 586-786-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | WASHINGTON | MI |
| — | 586-786-9XXX | 9000–9999 | Reserved | MICHIGAN BELL TEL CO | 9323 | WASHINGTON | 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.