Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AF4SC callsign genealogy
Currently held by CAMPBELL, 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 AF4SC's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AF4SC.
No current licensee on record previously held this callsign.