Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4CTJ 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 KK4CTJ's current licensee, walking backwards.
- Madison, Keith EGAgranted 2011-03-10cancelled 2011-06-20
Successor callsigns
Callsigns held now by people who previously held KK4CTJ.
- Madison, Keith EGAgranted 2021-10-19