Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FDM callsign genealogy
Currently held by Sherry, Keith
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 K4FDM's current licensee, walking backwards.
- Sherry, KeithTXgranted 2021-01-26cancelled 2021-03-09
Successor callsigns
Callsigns held now by people who previously held K4FDM.
No current licensee on record previously held this callsign.