Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT4OA callsign genealogy
Currently held by ROSE, MARK 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 KT4OA's current licensee, walking backwards.
- KD4IMPno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KT4OA.
- ROSE, MARK MSCgranted 2023-11-14