N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 4, 2026) · next update tomorrow 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

THOMAS K WARNOCK

FRN 0025163759 · first licensed Jan 8, 2016 as KM4QCD · 2 licenses on record

📝 FCC applications (4)

Received	File number	Service	Purpose	Status	Call
Jan 5, 2026	0011852639	HAM	Renewal	Granted	W4DIW
Feb 3, 2016	0007125405	HAM	Duplicate license	Granted	W4DIW
Jan 8, 2016	0007090139	HAM	Modification	Granted	KM4QCD
Jan 8, 2016	0007089887	HAM	New license	Granted	KM4QCD

Complete licensing history

W4DIW Active Technician · vanity Jan 26, 2016 → expires Jan 26, 2036

Licensee
THOMAS K WARNOCK

Address
PO Box 11281
BURKE, VA 22009

FRN
0025163759

Previous call
KM4QCD

Last granted
Jan 6, 2026

Effective
Jan 6, 2026

Last action
Jan 6, 2026
FCC actions (3)
- Jan 6, 2026 — License renewed LIREN
- Jan 26, 2016 — Vanity call sign granted VANGRT
- Jan 26, 2016 — License issued LIISS
KM4QCD Canceled Technician Jan 8, 2016 → Jan 26, 2016 (canceled)

Licensee
THOMAS K WARNOCK

Address
PO Box 11281
BURKE, VA 22009

FRN
0025163759

Last granted
Jan 8, 2016

Effective
Jan 8, 2016

Last action
Jan 26, 2016
FCC actions (3)
- Jan 26, 2016 — License canceled LICAN
- Jan 8, 2016 — License issued LIISS
- Jan 8, 2016 — 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 Jan 14, 2016 → Oct 4, 2026 · 59 snapshots · as KM4QCD
THOMAS K WARNOCK
PO Box 11281
BURKE, VA 22009

Vanity applications

Filed · Award	Applicant	Requested (in order)	Status
Filed Jan 8, 2016 Granted Jan 6, 2026 0007090139	KM4QCD · THOMAS K WARNOCK · Technician PO Box 11281 · BURKE, VA 22009	1.W4DIW ✓ granted 2.K4TKW held	Granted got W4DIW