Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4XY callsign genealogy
Currently held by Michelson, Robert 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 AI4XY's current licensee, walking backwards.
- Michelson, Robert CGAgranted 2003-03-28cancelled 2007-05-04
Successor callsigns
Callsigns held now by people who previously held AI4XY.
No current licensee on record previously held this callsign.