Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9IV callsign genealogy
Currently held by Cichon, Robert 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 AC9IV's current licensee, walking backwards.
- Cichon, Robert EINgranted 2014-03-04cancelled 2014-07-09
Successor callsigns
Callsigns held now by people who previously held AC9IV.
No current licensee on record previously held this callsign.