Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4EFX callsign genealogy
Currently held by DROGAN, FRANK J
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 K4EFX's current licensee, walking backwards.
- Cheal, James RFLgranted 2006-07-05cancelled 2007-08-24
Successor callsigns
Callsigns held now by people who previously held K4EFX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4EFX, oldest first.
- DROGAN, FRANK J FL1994-10-04 → cancelled 2006-10-05
- Cheal, Jim FL2017-11-07 active