Confidence: Medium · Source: FCC ULS · As of 2026-09-11
K1FST callsign genealogy
Currently held by Grumbos, Nicholas
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 K1FST's current licensee, walking backwards.
- Grumbos, NickAZgranted 2022-01-10cancelled 2022-01-28
Successor callsigns
Callsigns held now by people who previously held K1FST.
No current licensee on record previously held this callsign.