Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7AMI callsign genealogy
Currently held by Linstruth, Walter 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 K7AMI's current licensee, walking backwards.
- RIDDELL JR, FRANK EIDgranted 2013-06-18cancelled 2022-04-12
Successor callsigns
Callsigns held now by people who previously held K7AMI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7AMI, oldest first.
- Linstruth, Walter A UT2007-07-06 → cancelled 2019-09-18
- RIDDELL JR, FRANK E ID2022-04-12 active