N9TPB
FCC License Search
🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 4, 2026) · next update today 8:30 am CDT
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HAMs within 5 miles of N9TPB · Extra class operators in Madison, WI · or try N9TPB · K9* wildcards · Smith, John · 0004797601 (FRN) · 53703 · Madison, WIKO4AEX HAM
✅ Available for a vanity request — free since Apr 19, 2022.
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 Apr 19, 2022
Previous holder: John L Grundhoefer
Held KO4AEX Nov 20, 2019 → Apr 18, 2020 · first licensed Nov 20, 2019 as KO4AEX · 3 licenses · FRN 0028962496
-
- Licensee
- John L Grundhoefer
- Address
- Attn: John Grundhoefer
1328 Trailwater Chase NW
Acworth, GA 30102
- FRN
- 0028962496
- Previous call
- KV5IE (General)
- Last granted
- Jun 1, 2020
- Effective
- Jun 1, 2020
- Last action
- Jun 1, 2020
FCC actions (2)
- Jun 1, 2020 — Vanity call sign granted VANGRT
- Jun 1, 2020 — License issued LIISS
-
- Licensee
- John L Grundhoefer
- Address
- Attn: John Grundhoefer
1328 Trailwater Chase NW
Acworth, GA 30102
- FRN
- 0028962496
- Previous call
- KO4AEX (General)
- Last granted
- Apr 18, 2020
- Effective
- Apr 18, 2020
- Last action
- Jun 1, 2020
FCC actions (3)
- Jun 1, 2020 — License canceled LICAN
- Apr 18, 2020 — Vanity call sign granted VANGRT
- Apr 18, 2020 — License issued LIISS
-
- Licensee
- John L Grundhoefer
- Address
- 1328 Trailwater Chase NW
Acworth, GA 30102
- FRN
- 0028962496
- Last granted
- Nov 20, 2019
- Effective
- Mar 4, 2020
- Last action
- Apr 18, 2020
FCC actions (5)
- Apr 18, 2020 — License canceled LICAN
- Mar 4, 2020 — License modified LIMOD
- Jan 17, 2020 — License modified LIMOD
- Nov 20, 2019 — License issued LIISS
- Nov 20, 2019 — 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 Apr 16, 2022 → Oct 4, 2026 · 39 snapshots · as KO4AEX
John L Grundhoefer
1328 Trailwater Chase NW, Acworth, GA 30102
📡 On the air: APRS, digital & WSPR spots
No APRS positions, PSK Reporter reports or WSPR spots for KO4AEX in the last 24 hours. They show up here within seconds of KO4AEX beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.