Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0CAL callsign genealogy
Currently held by Cale, Curtis
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 K0CAL's current licensee, walking backwards.
- Lanczkowski, Charles AILgranted 2017-06-26cancelled 2017-07-14
Successor callsigns
Callsigns held now by people who previously held K0CAL.
- Cale, CurtisCAgranted 2010-01-29cancelled 2022-02-01
All historical holders
Every license row we've seen with the callsign K0CAL, oldest first.
- Cale, Curtis CA2009-11-06 → cancelled 2010-01-29
- Lanczkowski, Charles A IL2017-07-14 active