Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0GIS callsign genealogy
Currently held by Wardrup, Robert 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 KC0GIS's current licensee, walking backwards.
- Wardrup, Robert RCOgranted 2020-08-04cancelled 2025-01-24
Successor callsigns
Callsigns held now by people who previously held KC0GIS.
- Wardrup, Robert RCOgranted 2025-12-09
All historical holders
Every license row we've seen with the callsign KC0GIS, oldest first.
- Zavrel, Lauren L CO1999-08-27 → cancelled 2011-08-30
- Wardrup, Robert R CO2025-01-24 → cancelled 2025-12-09