Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1CSL callsign genealogy
Currently held by Semich, J William
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 K1CSL's current licensee, walking backwards.
- Semich, J WilliamMAgranted 2018-09-14cancelled 2018-10-05
Successor callsigns
Callsigns held now by people who previously held K1CSL.
No current licensee on record previously held this callsign.