Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4OS callsign genealogy
Currently held by Voshell, Frank J
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 AI4OS's current licensee, walking backwards.
- VOSHELL, FRANK JNCgranted 1999-03-13cancelled 2006-03-13
Successor callsigns
Callsigns held now by people who previously held AI4OS.
- Voshell, Frank JSCgranted 2024-02-28