Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1GTC callsign genealogy
Currently held by Penttila, Cassandra L
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 K1GTC's current licensee, walking backwards.
- Penttila, Cassandra LMAgranted 2017-08-30cancelled 2020-04-07
Successor callsigns
Callsigns held now by people who previously held K1GTC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1GTC, oldest first.
- PENTTILA, LELAND G MA2017-05-12 → cancelled 2020-01-10
- Penttila, Cassandra L MA2020-04-07 active