Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4RSL callsign genealogy
Currently held by Penley, Michael O
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 KK4RSL's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KK4RSL.
- Penley PhD, Michael OTNgranted 2013-06-07cancelled 2014-01-25