Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4AD callsign genealogy
Currently held by Stone, Doyle D
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 AI4AD's current licensee, walking backwards.
- Stone, Doyle DFLgranted 2002-08-19cancelled 2003-06-25
Successor callsigns
Callsigns held now by people who previously held AI4AD.
No current licensee on record previously held this callsign.