Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4DNR callsign genealogy
Currently held by RICHARDSON, DOUGLAS N
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 KD4DNR's current licensee, walking backwards.
- RICHARDSON, DOUGLAS NFLgranted 2016-06-18cancelled 2026-04-14
Successor callsigns
Callsigns held now by people who previously held KD4DNR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4DNR, oldest first.
- CARL, GREGORY G VA1991-08-06 → cancelled 2003-08-07
- RICHARDSON, DOUGLAS N FL2026-04-14 active