Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4RSF callsign genealogy
Currently held by Fowler, Richard S
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 K4RSF's current licensee, walking backwards.
- Fedele, Raymond SSCgranted 2023-06-07cancelled 2025-01-28
Successor callsigns
Callsigns held now by people who previously held K4RSF.
- Fowler, Richard SPAgranted 2016-04-02
All historical holders
Every license row we've seen with the callsign K4RSF, oldest first.
- Fowler, Richard S PA2016-03-15 → cancelled 2016-04-02
- Fedele, Raymond S SC2025-01-28 active