NumberResearchThousands-blocks in 217-388
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 217-388 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 217 blocks
Most active assignees, all time — NPA 217
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 217-388-0XXX | 0000–0999 | Available | MELVIN | IL | ||
| 2019-06-07 | 217-388-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | MELVIN | IL |
| — | 217-388-2XXX | 2000–2999 | Reserved | FRONTIER NORTH, INC. - IL | 1015 | MELVIN | IL |
| 2010-01-21 | 217-388-3XXX | 3000–3999 | Assigned | MCC TELEPHONY LLC | 593K | MELVIN | IL |
| 2020-06-22 | 217-388-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | MELVIN | IL |
| 2018-09-06 | 217-388-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | MELVIN | IL |
| 2016-05-10 | 217-388-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MELVIN | IL |
| — | 217-388-7XXX | 7000–7999 | Reserved | FRONTIER NORTH, INC. - IL | 1015 | MELVIN | IL |
| 2015-10-06 | 217-388-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | MELVIN | IL |
| 2019-06-07 | 217-388-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | MELVIN | IL |
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.