Confidence: Medium · Source: FCC ULS · As of 2026-09-09
KR4ISO
CancelledKnudsen, Jonathan A
- Location
- Clarksville, TN
- Class
- Technician
- Granted
- 2026-01-06
- Expires
- 2036-01-06
- FRN
- 0037807260
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Vanity availability
515dAvailable on 2028-02-07
KR4ISO cancelled on 2026-02-07. Hold ends in 515 days.
Last held by Knudsen, Jonathan A (TN).
Confidence: High
Cancelled licenses begin the 2-year hold immediately on the cancellation date, so this is the firm release date per §97.19.
Callsign genealogy
Full chain →Prior holders later became
- Knudsen, Jonathan ATNgranted 2026-02-07
License history
0 eventsNo recorded events.