Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4TVO callsign genealogy
Currently held by Von Ohlen, Thomas F
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 K4TVO's current licensee, walking backwards.
- Von Ohlen, Thomas FFLgranted 2003-09-15cancelled 2003-10-28
Successor callsigns
Callsigns held now by people who previously held K4TVO.
No current licensee on record previously held this callsign.