Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KR4TOS callsign genealogy
Currently held by Stevenson, Michael T
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 KR4TOS's current licensee, walking backwards.
- Stevenson, Michael TTNgranted 2025-02-13cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held KR4TOS.
No current licensee on record previously held this callsign.