Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SBE callsign genealogy
Currently held by CAMPBELL, FREDERICK
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 K4SBE's current licensee, walking backwards.
- Sierra Leone, KGAgranted 2013-04-30cancelled 2019-09-13
Successor callsigns
Callsigns held now by people who previously held K4SBE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SBE, oldest first.
- CAMPBELL, FREDERICK FL1997-08-07 → cancelled 2008-05-30
- Sierra Leone, K GA2019-09-13 active