Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR1STF callsign genealogy
Currently held by Kristoffersen, Carl
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 KR1STF's current licensee, walking backwards.
- Kristoffersen, CarlCTgranted 2018-03-09cancelled 2021-02-17
Successor callsigns
Callsigns held now by people who previously held KR1STF.
No current licensee on record previously held this callsign.