Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9OU callsign genealogy
Currently held by Machan, Joseph 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 AB9OU's current licensee, walking backwards.
- Machan, Joseph EILgranted 2004-03-12cancelled 2007-07-02
Successor callsigns
Callsigns held now by people who previously held AB9OU.
No current licensee on record previously held this callsign.