Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SUP callsign genealogy
Currently held by Chappell, Thomas M
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 K4SUP's current licensee, walking backwards.
- Chappell, Thomas MNCgranted 2015-11-18cancelled 2015-12-08
Successor callsigns
Callsigns held now by people who previously held K4SUP.
No current licensee on record previously held this callsign.