Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4XC callsign genealogy
Currently held by Hartman, Bruce M
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 AI4XC's current licensee, walking backwards.
- Hartman, Bruce MTNgranted 2007-02-14cancelled 2007-04-17
Successor callsigns
Callsigns held now by people who previously held AI4XC.
No current licensee on record previously held this callsign.