Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4EJT callsign genealogy
Currently held by WILLIAMS, FREDERICK P
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 KB4EJT's current licensee, walking backwards.
- WILLIAMS, FREDERICK PNCgranted 2015-07-17cancelled 2023-05-19
Successor callsigns
Callsigns held now by people who previously held KB4EJT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4EJT, oldest first.
- KAUFMAN, CHARLES A FL1993-12-14 → cancelled 2005-12-15
- WILLIAMS, FREDERICK P NC2023-05-19 active