Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7TRO callsign genealogy
Currently held by Halleen, Gary R
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 K7TRO's current licensee, walking backwards.
- Halleen, Gary RORgranted 2011-09-13cancelled 2011-10-04
Successor callsigns
Callsigns held now by people who previously held K7TRO.
No current licensee on record previously held this callsign.