Confidence: Medium · Source: FCC ULS · As of 2026-09-10
KR4DSI
CancelledMartens, Mark D
- Location
- Fort Myers, FL
- Class
- Technician
- Granted
- 2025-05-06
- Expires
- 2035-05-06
- FRN
- 0036795953
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Vanity availability
283dAvailable on 2027-06-21
KR4DSI cancelled on 2025-06-21. Hold ends in 283 days.
Last held by Martens, Mark D (FL).
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
- Martens, Mark DFLgranted 2025-06-21
License history
0 eventsNo recorded events.