Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI6OU callsign genealogy
Currently held by Guder, David L
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 AI6OU's current licensee, walking backwards.
- Guder, David LCAgranted 2015-06-01cancelled 2016-04-01
Successor callsigns
Callsigns held now by people who previously held AI6OU.
- Guder, David LCAgranted 2022-12-06