Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ESF callsign genealogy
Currently held by Knight, Bryan A
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 K4ESF's current licensee, walking backwards.
- Knight, Bryan ATNgranted 2020-07-15cancelled 2020-11-20
Successor callsigns
Callsigns held now by people who previously held K4ESF.
No current licensee on record previously held this callsign.