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

David C Castillo

FRN 0034763771 · first licensed Dec 12, 2025 as KJ5NNM · 1 license on record

📻 GMRS licenses on this FRN

GMRS call	Status	Name	Location	Granted	Expires
WSAI250	Active	David Castillo	San Antonio, TX	Jan 18, 2024	Jan 18, 2034

📝 FCC applications (3)

Received	File number	Service	Purpose	Status	Call
Dec 11, 2025	0011825929	HAM	New license	Granted	KJ5NNM
Jan 19, 2024	0010864008	GMRS	Administrative update	Granted
Jan 16, 2024	0010857326	GMRS	New license	Granted

Complete licensing history

KJ5NNM Active Technician Dec 12, 2025 → expires Dec 12, 2035

Licensee
David C Castillo

Address
PO Box 782007
SAN ANTONIO, TX 78278-2007

FRN
0034763771

Last granted
Dec 12, 2025

Effective
Dec 12, 2025

Last action
Dec 12, 2025
FCC actions (2)
- Dec 12, 2025 — License issued LIISS
- Dec 12, 2025 — 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 → Oct 4, 2026 · 2 snapshots · as KJ5NNM
David C Castillo
PO Box 782007
SAN ANTONIO, TX 78278-2007