N9TPB
FCC License Search
🕒 FCC license data updated yesterday 8:30 am CDT (FCC files through Oct 1, 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, WIKR4ISO HAM
⏳ Not available yet — opens for vanity requests Feb 8, 2028, two years after the license was canceled (Feb 7, 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
Previous holder: Jonathan A Knudsen
Held KR4ISO Jan 6, 2026 → Feb 7, 2026 · first licensed Jan 6, 2026 as KR4ISO · 2 licenses · FRN 0037807260
-
- Licensee
- Jonathan A Knudsen
- Address
- 1006 Orchard Hills Dr
Clarksville, TN 37040-5375
- FRN
- 0037807260
- Previous call
- KR4ISO
- Last granted
- Feb 7, 2026
- Effective
- Feb 7, 2026
- Last action
- Feb 7, 2026
FCC actions (2)
- Feb 7, 2026 — Vanity call sign granted VANGRT
- Feb 7, 2026 — License issued LIISS
-
- Licensee
- Jonathan A Knudsen
- Address
- 1006 Orchard Hills Dr
Clarksville, TN 37040-5375
- FRN
- 0037807260
- Last granted
- Jan 6, 2026
- Effective
- Jan 6, 2026
- Last action
- Feb 7, 2026
FCC actions (3)
- Feb 7, 2026 — License canceled LICAN
- Jan 6, 2026 — License issued LIISS
- Jan 6, 2026 — Systematic call sign granted SYSGRT
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
- Seen Sep 27, 2026 · 2 snapshots · as KR4ISO
Jonathan A Knudsen
1006 Orchard Hills Dr, Clarksville, TN 37040-5375
📡 On the air: APRS, digital & WSPR spots
No APRS positions, PSK Reporter reports or WSPR spots for KR4ISO in the last 24 hours. They show up here within seconds of KR4ISO beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.