Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC7SM callsign genealogy
Currently held by Helwig, Larry 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 AC7SM's current licensee, walking backwards.
- Helwig, Larry DNVgranted 2000-06-10cancelled 2002-04-10
Successor callsigns
Callsigns held now by people who previously held AC7SM.
No current licensee on record previously held this callsign.