Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA9H callsign genealogy
Currently held by SWITZER, JAMES C
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 AA9H's current licensee, walking backwards.
- OTTO, DAVID RINgranted 2012-04-17cancelled 2021-10-30
Successor callsigns
Callsigns held now by people who previously held AA9H.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA9H, oldest first.
- SWITZER, JAMES C IL2009-10-08 → cancelled 2021-10-09
- OTTO, DAVID R IN2021-10-30 active