Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4CHM callsign genealogy
Currently held by CROOK JR, ERNEST E
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 K4CHM's current licensee, walking backwards.
- MILTON, CHARLES HFLgranted 2003-11-18cancelled 2012-05-25
Successor callsigns
Callsigns held now by people who previously held K4CHM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4CHM, oldest first.
- CROOK JR, ERNEST E TN1996-03-26 → cancelled 2008-03-27
- MILTON, CHARLES H FL2024-04-23 active