Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4TOI callsign genealogy
Currently held by VENTRESS, VANCE 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 K4TOI's current licensee, walking backwards.
- VENTRESS, VANCE Ecancelled 1999-04-08
Successor callsigns
Callsigns held now by people who previously held K4TOI.
No current licensee on record previously held this callsign.