Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4UXP callsign genealogy
Currently held by Merkel, Stephen D
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 KD4UXP's current licensee, walking backwards.
- Merkel, Stephen DFLgranted 2014-06-21cancelled 2021-06-04
Successor callsigns
Callsigns held now by people who previously held KD4UXP.
- Merkel, Stephen DFLgranted 2014-06-21cancelled 2021-06-04
All historical holders
Every license row we've seen with the callsign KD4UXP, oldest first.
- Merkel, Stephen D FL2012-10-02 → cancelled 2014-06-21
- Merkel, Stephen D FL2021-06-04 active