Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4OLE callsign genealogy
Currently held by MATTHEWS, 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 KD4OLE's current licensee, walking backwards.
- Fawcett Routh, Melissa NWAgranted 2022-10-27cancelled 2022-11-15
Successor callsigns
Callsigns held now by people who previously held KD4OLE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4OLE, oldest first.
- MATTHEWS, WILLIAM M FL2002-02-20 → cancelled 2014-05-20
- Fawcett Routh, Melissa N WA2022-11-15 active