Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0J callsign genealogy
Currently held by Mac Donald, Richard S
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 AD0J's current licensee, walking backwards.
- Sumter, Bradley RNEgranted 2014-10-01cancelled 2020-07-07
Successor callsigns
Callsigns held now by people who previously held AD0J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AD0J, oldest first.
- Mac Donald, Richard S CO2008-10-17 → cancelled 2018-05-20
- Sumter, Bradley R NE2020-07-07 active