Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI4UDN callsign genealogy
Currently held by HATFIELD, RONALD M
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 KI4UDN's current licensee, walking backwards.
- HATFIELD, RONALD MFLgranted 2006-09-06cancelled 2007-03-08
Successor callsigns
Callsigns held now by people who previously held KI4UDN.
- HATFIELD, RONALD MFLgranted 2006-09-06cancelled 2012-08-28