Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI5TJ callsign genealogy
Currently held by Cobb, Johnathan
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 AI5TJ's current licensee, walking backwards.
- Cobb, JohnathanTXgranted 2024-10-16cancelled 2024-10-18
Successor callsigns
Callsigns held now by people who previously held AI5TJ.
- Cobb, JohnathanTXgranted 2024-12-03cancelled 2025-03-08