Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4DI callsign genealogy
Currently held by Shaffer, Arthur G
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 AI4DI's current licensee, walking backwards.
- Shaffer, Arthur GKYgranted 2003-12-16cancelled 2004-01-07
Successor callsigns
Callsigns held now by people who previously held AI4DI.
- SHAFFER, ARTHUR GKYgranted 2023-11-04