Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3CEF callsign genealogy
Currently held by Fasting, Claus E
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 W3CEF's current licensee, walking backwards.
- Fasting, Claus EWYgranted 2024-04-23cancelled 2024-05-11
Successor callsigns
Callsigns held now by people who previously held W3CEF.
No current licensee on record previously held this callsign.