Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0OS callsign genealogy
Currently held by Simcox, Jim
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 AC0OS's current licensee, walking backwards.
- Simcox, JimMOgranted 2009-03-09cancelled 2009-04-16
Successor callsigns
Callsigns held now by people who previously held AC0OS.
No current licensee on record previously held this callsign.