Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9YRN callsign genealogy
Currently held by BERTERMANN, RALPH 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 K9YRN's current licensee, walking backwards.
- BERTERMANN, RALPH EILgranted 1997-07-24cancelled 2004-05-11
Successor callsigns
Callsigns held now by people who previously held K9YRN.
No current licensee on record previously held this callsign.