Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4WS callsign genealogy
Currently held by Hamfurs Amateur Radio Association
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 KM4WS's current licensee, walking backwards.
- KN6MCOcancelledHamfurs Amateur Radio AssociationCAgranted 2020-11-13cancelled 2020-12-08
Successor callsigns
Callsigns held now by people who previously held KM4WS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4WS, oldest first.
- DENKER, ROGER H VA1989-08-15 → cancelled 2001-08-16
- Hamfurs Amateur Radio Association CA2020-12-08 active