N9TPB FCC License Search
🕒 FCC license data updated today 6:02 am CDT (FCC files through Oct 2, 2026) · next update tomorrow 6:00 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

KM4CSO HAM

✅ Available for a vanity request — free since Jun 25, 2026.
2x3 call: any licensee can request it. No pending applications list it.

📬 QSL: no LoTW uploads on record · not eQSL AG · QRZ · HamQTH

Not currently held · 1 holder on record · available since Jun 25, 2026

Previous holder: John W Engle

Held KM4CSO Jun 24, 2014 → Jun 24, 2024 · first licensed Jun 24, 2014 as KM4CPP · 2 licenses · FRN 0023712367

Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for KM4CSO in the last 24 hours. They show up here within seconds of KM4CSO beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.