🕒 FCC license data updated today 9:42 am CDT (FCC files through Sep 30, 2026) · next update tomorrow 9:15 am CDT
Ask: hams within 5 miles of N9TPB · Extra class operators in Madison, WI · or try N9TPB · K9* wildcards · Smith, John · 0004797601 (FRN) · 53703 · Madison, WI
KF4OSS
✅ Available for a vanity request — free since Jan 11, 2008.
2x3 call: any licensee can request it.
No pending applications list it.
Not currently held
· 1 holder on record
· available since Jan 11, 2008
Previous holder: Charles W Ross
Held KF4OSS Jan 30, 1997 → Jan 10, 2006
· first licensed Jan 30, 1997 as KF4OSS
· 4 licenses · FRN 0004442067
KF5RActiveAmateur Extra · vanityJun 1, 2020 → expires Jun 1, 2030
Licensee
Charles W Ross
Address
4405 Jager Dr NE, Suite C4 #1024 Rio Rancho, NM 87144
No APRS positions, PSK Reporter reports or WSPR spots for KF4OSS in the last 24 hours. They show up here within seconds of KF4OSS beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.