Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC3FB callsign genealogy
Currently held by Flatt, Mark 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 AC3FB's current licensee, walking backwards.
- Flatt, Mark CPAgranted 2019-09-17cancelled 2019-09-23
Successor callsigns
Callsigns held now by people who previously held AC3FB.
No current licensee on record previously held this callsign.