Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AC9AO callsign genealogy
Currently held by STEIN, NICK
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 AC9AO's current licensee, walking backwards.
- STEIN, NICKILgranted 2011-08-11cancelled 2011-11-18
Successor callsigns
Callsigns held now by people who previously held AC9AO.
No current licensee on record previously held this callsign.