Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4JD callsign genealogy
Currently held by Koehler, Michael A
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 AI4JD's current licensee, walking backwards.
- Koehler, Michael AFLgranted 2003-08-01cancelled 2005-02-17
Successor callsigns
Callsigns held now by people who previously held AI4JD.
No current licensee on record previously held this callsign.