Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ATC callsign genealogy
Currently held by Schumacher, Karl A
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 K7ATC's current licensee, walking backwards.
- Schumacher, Karl AWAgranted 2018-03-08cancelled 2018-03-30
Successor callsigns
Callsigns held now by people who previously held K7ATC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7ATC, oldest first.
- AITKEN, GARY MT2005-08-02 → cancelled 2017-08-03
- Schumacher, Karl A WA2018-03-30 active