Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD0COS callsign genealogy
Currently held by Danis, Kate M
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 KD0COS's current licensee, walking backwards.
- Danis, Kate MCOgranted 2023-12-13cancelled 2024-01-03
Successor callsigns
Callsigns held now by people who previously held KD0COS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD0COS, oldest first.
- Ewald, William B MN2008-01-07 → cancelled 2020-01-08
- Danis, Kate M CO2024-01-03 active