Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FFK callsign genealogy
Currently held by Robbie, Mark A
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 K4FFK's current licensee, walking backwards.
- Robbie, Mark AALgranted 2009-02-23cancelled 2009-05-05
Successor callsigns
Callsigns held now by people who previously held K4FFK.
- Robbie, Mark AALgranted 2020-07-17