Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4TO callsign genealogy
Currently held by FERGUSON, JOHN 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 AI4TO's current licensee, walking backwards.
- FERGUSON, JOHN AFLgranted 2006-01-18cancelled 2007-02-23
Successor callsigns
Callsigns held now by people who previously held AI4TO.
No current licensee on record previously held this callsign.