Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4SSS callsign genealogy
Currently held by Stradtman Jr, Earl 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 KM4SSS's current licensee, walking backwards.
- Stradtman Jr, Earl WALgranted 2015-11-23cancelled 2016-01-29
Successor callsigns
Callsigns held now by people who previously held KM4SSS.
- Stradtman Jr, Earl WALgranted 2018-09-07