Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI5YC callsign genealogy
Currently held by Fischer, Stefan
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 AI5YC's current licensee, walking backwards.
- Fischer, StefanTXgranted 2025-07-08cancelled 2025-08-05
Successor callsigns
Callsigns held now by people who previously held AI5YC.
No current licensee on record previously held this callsign.