Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KB4MFD callsign genealogy
Currently held by Forrest, Mark B
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 KB4MFD's current licensee, walking backwards.
- Forrest, Mark BTNgranted 2003-06-12cancelled 2003-07-04
Successor callsigns
Callsigns held now by people who previously held KB4MFD.
- Forrest, Mark BTNgranted 2003-07-04cancelled 2004-08-06