Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4SV callsign genealogy
Currently held by Welch, John J
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 AI4SV's current licensee, walking backwards.
- Welch JR, John JVAgranted 2004-03-08cancelled 2007-01-16
Successor callsigns
Callsigns held now by people who previously held AI4SV.
No current licensee on record previously held this callsign.