Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0OO callsign genealogy
Currently held by RISSMEYER, CHARLES S
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 AC0OO's current licensee, walking backwards.
- RISSMEYER, CHARLES SMNgranted 2008-09-12cancelled 2009-03-31
Successor callsigns
Callsigns held now by people who previously held AC0OO.
- RISSMEYER, CHARLES SFLgranted 2019-02-07