Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JVO callsign genealogy
Currently held by Von Ohlen, John G
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 K4JVO's current licensee, walking backwards.
- Von Ohlen, John GFLgranted 2003-08-01cancelled 2004-12-11
Successor callsigns
Callsigns held now by people who previously held K4JVO.
No current licensee on record previously held this callsign.