Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4CH callsign genealogy
Currently held by BARTHEL, DIXON C
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 AI4CH's current licensee, walking backwards.
- Hung, CarolinaFLgranted 2024-08-06cancelled 2024-11-05
Successor callsigns
Callsigns held now by people who previously held AI4CH.
- BARTHEL, DIXON CMDgranted 2026-07-01
All historical holders
Every license row we've seen with the callsign AI4CH, oldest first.
- BARTHEL, DIXON C PA2013-08-24 → cancelled 2016-09-27
- Hung, Carolina FL2024-11-05 active