NumberResearchThousands-blocks in 517-459
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 517-459 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 517 blocks
Most active assignees, all time — NPA 517
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-11-17 | 517-459-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | PARMA | MI |
| 2021-05-19 | 517-459-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PARMA | MI |
| 2016-05-24 | 517-459-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | PARMA | MI |
| 2021-03-26 | 517-459-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | PARMA | MI |
| 2021-03-26 | 517-459-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | PARMA | MI |
| — | 517-459-5XXX | 5000–5999 | Assigned (pending) | PARMA | MI | ||
| 2012-05-03 | 517-459-6XXX | 6000–6999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | PARMA | MI |
| 2013-03-26 | 517-459-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | PARMA | MI |
| 2020-08-11 | 517-459-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | PARMA | MI |
| 2020-08-11 | 517-459-9XXX | 9000–9999 | Assigned | ONVOY, LLCV - MI | 543C | PARMA | 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.