Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9US callsign genealogy
Currently held by Wojnowiak, Mark H
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 AC9US's current licensee, walking backwards.
- Wojnowiak, Mark HWIgranted 2002-12-02cancelled 2004-10-22
Successor callsigns
Callsigns held now by people who previously held AC9US.
No current licensee on record previously held this callsign.