Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0IS callsign genealogy
Currently held by Calhoun, Gerald D
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 AC0IS's current licensee, walking backwards.
- Calhoun, Gerald DIAgranted 1998-09-18cancelled 2007-06-27
Successor callsigns
Callsigns held now by people who previously held AC0IS.
No current licensee on record previously held this callsign.