Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF6XF callsign genealogy
Currently held by SCHULKE, DONALD R
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 KF6XF's current licensee, walking backwards.
- COLLINS, MICHAEL CVAgranted 2016-06-16cancelled 2016-09-07
Successor callsigns
Callsigns held now by people who previously held KF6XF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF6XF, oldest first.
- SCHULKE, DONALD R CA1994-09-13 → cancelled 2006-09-14
- COLLINS, MICHAEL C VA2016-09-07 active