Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4FLY callsign genealogy
Currently held by MC CAULEY, MARK W
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KD4FLY's current licensee, walking backwards.
- MC CAULEY, MARK WMIgranted 2006-10-13cancelled 2006-10-31
Successor callsigns
Callsigns held now by people who previously held KD4FLY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4FLY, oldest first.
- ANTHONY JR, JOHN D GA1993-08-24 → cancelled 2005-08-25
- MC CAULEY, MARK W MI2017-09-06 active