Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD0UCB callsign genealogy
Currently held by FENZLAFF, RALPH B
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 KD0UCB's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KD0UCB.
- FENZLAFF, RALPH BCOgranted 2016-11-11cancelled 2019-08-30