Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7CDU callsign genealogy
Currently held by Utzinger, Christoph 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 W7CDU's current licensee, walking backwards.
- Utzinger, Chris DWAgranted 2010-10-26cancelled 2018-10-19
Successor callsigns
Callsigns held now by people who previously held W7CDU.
No current licensee on record previously held this callsign.