Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO7WDC callsign genealogy
Currently held by Crapse, Warren D
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 KO7WDC's current licensee, walking backwards.
- Crapse, Warren DAZgranted 2014-06-03cancelled 2014-07-11
Successor callsigns
Callsigns held now by people who previously held KO7WDC.
No current licensee on record previously held this callsign.