Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD6SM callsign genealogy
Currently held by SPARLIN, DOUGLAS G
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 AD6SM's current licensee, walking backwards.
- SPARLIN, DOUGLAS GCAgranted 1997-03-20cancelled 2000-09-01
Successor callsigns
Callsigns held now by people who previously held AD6SM.
- SPARLIN, DOUGLAS GCAgranted 2001-01-03cancelled 2013-01-04