N9TPB FCC License Search
🕒 FCC license data updated yesterday 7:15 am CDT (FCC files through Oct 6, 2026) · next update today 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

N1OSN HAM

⏳ Not available yet — opens for vanity requests May 15, 2027, two years after the license was canceled (May 14, 2025).
1x3 call: Technician, General, Advanced and Amateur Extra licensees can request it. No pending applications list it.

📬 QSL: LoTW user · last upload Jul 25, 2023 · not eQSL AG · QRZ · HamQTH

Not currently held · 1 holder on record

Previous holder: David P Riesz

Held N1OSN Mar 23, 1993 → May 14, 2025 · first licensed Mar 23, 1993 as N1OSN · 2 licenses · FRN 0008799710

Callbook Records, 1993–2003
From the FCC amateur database as published on the QRZ! callsign CD-ROMs, 1993–2003, before and alongside the FCC's online records (which start in 1999). "Seen" dates are the first and last disc showing that record; the issue date is the FCC's, so it can be a renewal of an even older license.
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
N1OSN in the Printed Callbooks, 1909–1997
From scanned copies of the printed callbooks (government lists from 1913, then the Radio Amateur Callbook to 1997), read by OCR, so names and streets can carry typos. Each line is one or more editions in a row showing the same name at the same address.

📡 On the Air: APRS, Digital & WSPR Spots

No APRS positions, PSK Reporter reports or WSPR spots for N1OSN in the last 24 hours. They show up here within seconds of N1OSN beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.