Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4JDJ callsign genealogy
Currently held by McSemek, Timothy F
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 KJ4JDJ'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 KJ4JDJ.
- McSemek, Timothy FNCgranted 2009-01-28cancelled 2021-01-29