N9TPB FCC License Search

🕒 FCC license data updated yesterday 9:45 am CDT · next update today 7:15 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

K2USZ HAM

✅ Available for a vanity request — free since Jun 24, 2025.

1x3 call: Technician, General, Advanced and Amateur Extra licensees 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 24, 2025

Previous holder: STEPHEN A HELMSTADTER

Held K2USZ Mar 18, 2009 → Jun 23, 2023 · first licensed Mar 18, 2009 as K2USZ · 3 licenses · FRN 0018608778

K7QN Active Amateur Extra · vanity Oct 24, 2023 → expires Oct 24, 2033

Licensee
STEPHEN A HELMSTADTER

Address
1539 E HESPERUS WAY
QUEEN CREEK, AZ 85140
33.2127, -111.5492 (street) · Grid DM43ff · CQ 3 · ITU 6 · map ↗

FRN
0018608778

Previous call
K2YI (General)

Last granted
Oct 24, 2023

Effective
Oct 24, 2023

Last action
Oct 24, 2023
FCC actions (2)
- Oct 24, 2023 — Vanity call sign granted VANGRT
- Oct 24, 2023 — License issued LIISS
K2YI Canceled Amateur Extra · vanity Jun 23, 2023 → Oct 24, 2023 (canceled)

Licensee
STEPHEN A HELMSTADTER

Address
1539 E HESPERUS WAY
QUEEN CREEK, AZ 85140
33.2127, -111.5492 (street) · Grid DM43ff · CQ 3 · ITU 6 · map ↗

FRN
0018608778

Previous call
K2USZ (General)

Last granted
Jun 23, 2023

Effective
Jun 23, 2023

Last action
Oct 24, 2023
FCC actions (3)
- Oct 24, 2023 — License canceled LICAN
- Jun 23, 2023 — Vanity call sign granted VANGRT
- Jun 23, 2023 — License issued LIISS
K2USZ Canceled Amateur Extra Mar 18, 2009 → Jun 23, 2023 (canceled)

Licensee
STEPHEN A HELMSTADTER

Address
1539 E HESPERUS WAY
QUEEN CREEK, AZ 85140
33.2127, -111.5492 (street) · Grid DM43ff · CQ 3 · ITU 6 · map ↗

FRN
0018608778

Last granted
Apr 26, 2019

Effective
Apr 17, 2023

Last action
Jun 23, 2023
FCC actions (7)
- Jun 23, 2023 — License canceled LICAN
- Apr 17, 2023 — License modified LIMOD
- Apr 5, 2023 — Administrative update LIAUA
- Apr 26, 2019 — License renewed LIREN
- Mar 19, 2015 — Administrative update LIAUA
- Mar 18, 2009 — FCC action ESUFRN
- Mar 18, 2009 — License renewed LIREN

Address history

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

Seen Apr 27, 2024 → Oct 4, 2026 · 36 snapshots · as K2USZ
STEPHEN A HELMSTADTER
1539 E HESPERUS WAY, QUEEN CREEK, AZ 85140
33.2127, -111.5492 (street) · Grid DM43ff · CQ 3 · ITU 6 · map ↗
Seen Mar 28, 2015 → Apr 16, 2022 · 24 snapshots · as K2USZ
STEPHEN A HELMSTADTER
1539 E HESPERUS WAY, SAN TAN VALLEY, AZ 85140
33.2481, -111.4892 (ZIP center) · Grid DM43gf · CQ 3 · ITU 6 · map ↗
Seen May 27, 2010 → May 22, 2014 · 11 snapshots · as K2USZ
STEPHEN A HELMSTADTER
Attn: Stephen Helmstadter
5462 S. Peachwood Drive, Gilbert, AZ 85298
33.2398, -111.7282 (ZIP center) · Grid DM43df · CQ 3 · ITU 6 · map ↗
Seen Nov 7, 2004 · 1 snapshot · as K2USZ
STEPHEN A HELMSTADTER
PO Box 337
WYCKOFF, NJ 07481
40.9991, -74.1688 (ZIP center) · Grid FN20vx · CQ 5 · ITU 8 · map ↗

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for K2USZ in the last 24 hours. They show up here within seconds of K2USZ beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.