Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA6IS callsign genealogy
Currently held by Madron, Ryan P
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 AA6IS's current licensee, walking backwards.
- Madron, Ryan PCAgranted 2010-08-18cancelled 2010-10-26
Successor callsigns
Callsigns held now by people who previously held AA6IS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA6IS, oldest first.
- YARBER, LANDO D CA1988-05-24 → cancelled 2000-05-25
- Madron, Ryan P CA2020-07-30 active