Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6IMJ callsign genealogy
Currently held by JOHANSEN, THEODORE C
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 K6IMJ's current licensee, walking backwards.
- Jaremko, MarkCAgranted 2024-10-25cancelled 2024-11-30
Successor callsigns
Callsigns held now by people who previously held K6IMJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6IMJ, oldest first.
- JOHANSEN, THEODORE C CA2007-07-03 → cancelled 2019-07-04
- Jaremko, Mark CA2024-11-30 active