Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9RTK callsign genealogy
Currently held by Kopp III, Rudolph T
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 W9RTK's current licensee, walking backwards.
- Kopp, Rudolph TWIgranted 2012-04-30cancelled 2012-11-16
Successor callsigns
Callsigns held now by people who previously held W9RTK.
No current licensee on record previously held this callsign.