NumberResearchThousands-blocks in 989-866
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 989-866 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 989 blocks
Most active assignees, all time — NPA 989
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 989-866-0XXX | 0000–0999 | Reserved | WINN TEL. CO. | 0737 | WINN | MI |
| — | 989-866-1XXX | 1000–1999 | Reserved | WINN TEL. CO. | 0737 | WINN | MI |
| — | 989-866-2XXX | 2000–2999 | Reserved | WINN TEL. CO. | 0737 | WINN | MI |
| 2019-08-21 | 989-866-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | WINN | MI |
| 2022-03-04 | 989-866-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | WINN | MI |
| — | 989-866-5XXX | 5000–5999 | Available | WINN | MI | ||
| — | 989-866-6XXX | 6000–6999 | Reserved | WINN TEL. CO. | 0737 | WINN | MI |
| 2011-06-30 | 989-866-7XXX | 7000–7999 | Assigned | ACD TELECOM, INC. - MI | 3535 | WINN | MI |
| — | 989-866-8XXX | 8000–8999 | Reserved | WINN TEL. CO. | 0737 | WINN | MI |
| — | 989-866-9XXX | 9000–9999 | Reserved | WINN TEL. CO. | 0737 | WINN | 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.