Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FBS callsign genealogy
Currently held by Sparkman, Fred 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 K4FBS's current licensee, walking backwards.
- Sparkman, Fred BALgranted 2021-04-01cancelled 2021-05-15
Successor callsigns
Callsigns held now by people who previously held K4FBS.
No current licensee on record previously held this callsign.