Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD7X callsign genealogy
Currently held by OLIVER, WILLIAM M
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 KD7X's current licensee, walking backwards.
- OLIVER, WILLIAM MWAgranted 1998-07-23cancelled 2007-03-10
Successor callsigns
Callsigns held now by people who previously held KD7X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD7X, oldest first.
- AHLEFELD, RICHARD G OR1995-04-26 → cancelled 2004-01-29
- OLIVER, WILLIAM M WA2017-01-04 active