Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4ATR callsign genealogy
Currently held by Madison, Keith E
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 KK4ATR'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 KK4ATR.
- Madison, Keith EGAgranted 2011-03-10cancelled 2011-07-09