Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI5XL callsign genealogy
Currently held by Koch, Karsten
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 AI5XL's current licensee, walking backwards.
- Koch, KarstenTXgranted 2025-03-18cancelled 2025-06-20
Successor callsigns
Callsigns held now by people who previously held AI5XL.
No current licensee on record previously held this callsign.