N9TPB FCC License Search

🕒 FCC license data updated yesterday 9:42 am CDT (FCC files through Sep 30, 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

AI4JS HAM

✅ Available for a vanity request — free since Apr 23, 2007.

2x2 call: only Amateur Extra licensees can request it. No pending applications list it.

Not currently held · 1 holder on record · available since Apr 23, 2007

Previous holder: Robert L Madderra

Held AI4JS Dec 10, 2004 → Apr 22, 2005 · first licensed Dec 10, 2004 as KI4HZM · 3 licenses · FRN 0012294336

KF4SS Active Amateur Extra · vanity Apr 22, 2005 → expires Apr 22, 2035

Licensee
Robert L Madderra

Address
8100 River Circle
Atlanta, GA 30350
33.9734, -84.2960 (street) · Grid EM73ux · CQ 5 · ITU 8 · map ↗

FRN
0012294336

Previous call
AI4JS (General)

Last granted
Apr 11, 2025

Effective
Apr 11, 2025

Last action
Apr 11, 2025
FCC actions (5)
- Apr 11, 2025 — License renewed LIREN
- Mar 5, 2015 — License renewed LIREN
- Apr 10, 2008 — Administrative update LIAUA
- Apr 22, 2005 — Vanity call sign granted VANGRT
- Apr 22, 2005 — License issued LIISS
AI4JS Canceled Amateur Extra Dec 10, 2004 → Apr 22, 2005 (canceled)

Licensee
Bob L Madderra

Address
3707 Dunwoody Club Dr
Atlanta, GA 30350
33.9803, -84.3300 (ZIP center) · Grid EM73ux · CQ 5 · ITU 8 · map ↗

FRN
0012294336

Previous call
KI4HZM (General)

Last granted
Dec 10, 2004

Effective
Mar 23, 2005

Last action
Apr 22, 2005
FCC actions (3)
- Apr 22, 2005 — License canceled LICAN
- Mar 23, 2005 — Systematic call sign granted SYSGRT
- Mar 23, 2005 — License issued LIISS
KI4HZM Canceled Amateur Extra Dec 10, 2004 → Mar 23, 2005 (canceled)

Licensee
Bob L Madderra

Address
3707 Dunwoody Club Dr
Atlanta, GA 30350
33.9803, -84.3300 (ZIP center) · Grid EM73ux · CQ 5 · ITU 8 · map ↗

FRN
0012294336

Last granted
Dec 10, 2004

Effective
Feb 7, 2005

Last action
Mar 23, 2005
FCC actions (4)
- Mar 23, 2005 — License canceled LICAN
- Feb 7, 2005 — License modified LIMOD
- Dec 10, 2004 — License issued LIISS
- Dec 10, 2004 — 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 May 27, 2010 → Sep 27, 2026 · 92 snapshots · as KI4HZM
Bob L Madderra
3707 Dunwoody Club Dr, Atlanta, GA 30350
33.9803, -84.3300 (ZIP center) · Grid EM73ux · CQ 5 · ITU 8 · map ↗
Seen May 27, 2010 → Sep 27, 2026 · 46 snapshots · as KF4SS
Robert L Madderra
8100 River Circle, Atlanta, GA 30350
33.9734, -84.2960 (street) · Grid EM73ux · CQ 5 · ITU 8 · map ↗

Others requesting AI4JS

3 applications listed AI4JS as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Feb 8, 2022	Feb 26, 2022	KC1QBB · Jan Slezak · Rye, NH	15	Granted
Feb 29, 2016	Mar 18, 2016	KC9CXE · Jon E Scharbrough · Fort Myers, FL	4	Granted
May 5, 2014	May 23, 2014	KC9CXE · Jon E Scharbrough · Fort Myers, FL	2	Dismissed

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for AI4JS in the last 24 hours. They show up here within seconds of AI4JS beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.