Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1FRS callsign genealogy
Currently held by Strumpf, Frederick R
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 KC1FRS's current licensee, walking backwards.
- Strumpf, Frederick RCTgranted 2020-07-15cancelled 2020-08-04
Successor callsigns
Callsigns held now by people who previously held KC1FRS.
- Drew Mr, Matthew ARIgranted 2026-06-26
All historical holders
Every license row we've seen with the callsign KC1FRS, oldest first.
- Drew, Matthew A RI2016-05-09 → cancelled 2016-06-25
- Strumpf, Frederick R CT2020-08-04 active