Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA6BC callsign genealogy
Currently held by CHANG, MAXIMILIAN Y
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 AA6BC's current licensee, walking backwards.
- CHANG, MAXIMILIAN YCAgranted 2011-12-24cancelled 2021-03-30
Successor callsigns
Callsigns held now by people who previously held AA6BC.
- CHANG, MAXIMILIAN YCAgranted 2021-04-20
All historical holders
Every license row we've seen with the callsign AA6BC, oldest first.
- Ritterband, Richard L CA2006-09-07 → cancelled 2018-11-06
- CHANG, MAXIMILIAN Y CA2021-03-30 → cancelled 2021-04-20