NumberResearchThousands-blocks in 989-533
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 989-533 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 |
|---|---|---|---|---|---|---|---|
| — | 989-533-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ALMA | MI |
| 2010-12-03 | 989-533-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ALMA | MI |
| — | 989-533-2XXX | 2000–2999 | Available | ALMA | MI | ||
| 2010-11-09 | 989-533-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ALMA | MI |
| 2011-01-20 | 989-533-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | ALMA | MI |
| 2013-02-14 | 989-533-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | ALMA | MI |
| — | 989-533-6XXX | 6000–6999 | Available | ALMA | MI | ||
| 2015-03-17 | 989-533-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ALMA | MI |
| 2007-11-05 | 989-533-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ALMA | MI |
| 2005-09-22 | 989-533-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ALMA | 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.