Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4AST callsign genealogy
Currently held by Wikstrom, John 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 K4AST's current licensee, walking backwards.
- Thyot, Armand SMSgranted 2016-03-28cancelled 2017-03-07
Successor callsigns
Callsigns held now by people who previously held K4AST.
- Wikstrom, John AVAgranted 2012-11-16cancelled 2020-10-14
All historical holders
Every license row we've seen with the callsign K4AST, oldest first.
- Wikstrom, John A VA2007-07-25 → cancelled 2012-11-16
- Thyot, Armand S MS2017-03-07 active