NumberResearchThousands-blocks in 989-674
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 989-674 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 989-674-0XXX | 0000–0999 | Available | UNIONVILLE | MI | ||
| — | 989-674-1XXX | 1000–1999 | Available | UNIONVILLE | MI | ||
| — | 989-674-2XXX | 2000–2999 | Reserved | MICHIGAN BELL TEL CO | 9323 | UNIONVILLE | MI |
| 2006-10-20 | 989-674-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | UNIONVILLE | MI |
| 2012-09-14 | 989-674-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | UNIONVILLE | MI |
| 2011-09-20 | 989-674-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | UNIONVILLE | MI |
| 2015-04-03 | 989-674-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | UNIONVILLE | MI |
| 2013-03-26 | 989-674-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | UNIONVILLE | MI |
| — | 989-674-8XXX | 8000–8999 | Reserved | MICHIGAN BELL TEL CO | 9323 | UNIONVILLE | MI |
| — | 989-674-9XXX | 9000–9999 | Available | UNIONVILLE | MI |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.