Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1FJC callsign genealogy
Currently held by Crosdale, Fred
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 KB1FJC's current licensee, walking backwards.
- Crosdale, FredMAgranted 2026-06-18cancelled 2026-07-07
Successor callsigns
Callsigns held now by people who previously held KB1FJC.
- Viets, Phillip ACTgranted 2021-01-26cancelled 2021-03-13
All historical holders
Every license row we've seen with the callsign KB1FJC, oldest first.
- Viets, Phillip A CT2020-03-31 → cancelled 2021-01-26
- Crosdale, Fred MA2026-07-07 active