Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4GMI callsign genealogy
Currently held by Williams, John S
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 K4GMI's current licensee, walking backwards.
- Williams, John SFLgranted 2009-06-29cancelled 2009-07-18
Successor callsigns
Callsigns held now by people who previously held K4GMI.
No current licensee on record previously held this callsign.