Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3RDF callsign genealogy
Currently held by FENNER, ROBERT 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 K3RDF's current licensee, walking backwards.
- FENNER, ROBERT DPAgranted 1995-05-05cancelled 2000-10-24
Successor callsigns
Callsigns held now by people who previously held K3RDF.
No current licensee on record previously held this callsign.