Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC7QM callsign genealogy
Currently held by Heiselman, Mark 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 AC7QM's current licensee, walking backwards.
- Heiselman, Mark DAZgranted 1996-03-11cancelled 2002-01-14
Successor callsigns
Callsigns held now by people who previously held AC7QM.
No current licensee on record previously held this callsign.