Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4UD callsign genealogy
Currently held by SPAULDING, RALPH L
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 KC4UD'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 KC4UD.
- SPAULDING, RALPH LWAgranted 2017-09-09cancelled 2018-02-21