Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4AU callsign genealogy
Currently held by Crosswhite, Charles K
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 AI4AU's current licensee, walking backwards.
- Crosswhite, Charles KTNgranted 2003-07-16cancelled 2003-08-13
Successor callsigns
Callsigns held now by people who previously held AI4AU.
No current licensee on record previously held this callsign.