Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB1JDK callsign genealogy
Currently held by Mahar, Spencer C
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 KB1JDK'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 KB1JDK.
- MAHAR, SPENCER CCTgranted 2024-03-02