Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD6SD callsign genealogy
Currently held by Galvin, Mark W
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 AD6SD's current licensee, walking backwards.
- GALVIN, MARK WCAgranted 1994-08-15cancelled 2000-08-19
Successor callsigns
Callsigns held now by people who previously held AD6SD.
No current licensee on record previously held this callsign.