Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1FEU callsign genealogy
Currently held by TRUE, MARK 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 KB1FEU's current licensee, walking backwards.
- TRUE, MARK FMAgranted 1993-05-11cancelled 2000-06-02
Successor callsigns
Callsigns held now by people who previously held KB1FEU.
- TRUE, MARK FMAgranted 2020-07-09