Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI4ARB callsign genealogy
Currently held by Kierstein, Timothy M
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 KI4ARB's current licensee, walking backwards.
- Kierstein, Timothy MFLgranted 1999-10-19cancelled 2003-06-06
Successor callsigns
Callsigns held now by people who previously held KI4ARB.
- Kierstein, Timothy MFLgranted 2017-12-27