NumberResearchThousands-blocks in 217-487
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 217-487 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
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-11-13 | 217-487-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | CANTRALL | IL |
| 2018-06-28 | 217-487-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CANTRALL | IL |
| — | 217-487-2XXX | 2000–2999 | Available | CANTRALL | IL | ||
| 2010-05-21 | 217-487-3XXX | 3000–3999 | Assigned | MCC TELEPHONY LLC | 593K | CANTRALL | IL |
| 2004-06-21 | 217-487-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CANTRALL | IL |
| 2011-09-19 | 217-487-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CANTRALL | IL |
| 2013-11-06 | 217-487-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | CANTRALL | IL |
| — | 217-487-7XXX | 7000–7999 | Reserved | ILLINOIS BELL TEL CO | 9329 | CANTRALL | IL |
| 2019-06-21 | 217-487-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | CANTRALL | IL |
| 2014-12-17 | 217-487-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CANTRALL | IL |
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.