Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4ME callsign genealogy
Currently held by SITTERLEY, WILLIAM V P
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 KF4ME's current licensee, walking backwards.
- Koponen, Mark ANDgranted 2006-02-02cancelled 2010-11-09
Successor callsigns
Callsigns held now by people who previously held KF4ME.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4ME, oldest first.
- SITTERLEY, WILLIAM V P FL1988-07-12 → cancelled 2000-07-13
- Koponen, Mark A ND2020-09-02 active