Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7DO callsign genealogy
Currently held by FRIEDMAN, ARNOLD
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 KC7DO's current licensee, walking backwards.
- O NEAL, DOUGLASUTgranted 2004-04-01cancelled 2008-05-09
Successor callsigns
Callsigns held now by people who previously held KC7DO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7DO, oldest first.
- FRIEDMAN, ARNOLD TX1997-02-03 → cancelled 2008-01-23
- O NEAL, DOUGLAS UT2018-03-14 active