Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4YSG callsign genealogy
Currently held by FOLSOM, FREDERICK L
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 KD4YSG's current licensee, walking backwards.
- N9KLDno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KD4YSG.
- Nez, Daniel LILgranted 2017-12-05cancelled 2020-03-20