N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 11, 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 · old CB calls like KHC1939 or 18Q3518 (1962–63 CB call books) · (205) 546-1767 (1990s CB directory phones)

Jeffrey A Markoff

FRN 0036820256 · first licensed May 1, 2025 as KO6JCA · 1 license on record

📻 GMRS Licenses on This FRN

GMRS call	Status	Name	Location	Granted	Expires
WSLS290	Active	Jeffrey A Markoff	Laguna Niguel, CA	Feb 18, 2026	Feb 18, 2036

📝 FCC Applications (4)

Received	File number	Service	Purpose	Status	Call
Sep 29, 2026	0012201756	HAM	Modification	Granted	KO6JCA
Feb 17, 2026	0011910069	GMRS	New license	Granted
Sep 23, 2025	0011762878	HAM	Modification	Granted	KO6JCA
Apr 30, 2025	0011549663	HAM	New license	Granted	KO6JCA

Complete Licensing History

KO6JCA Active Amateur Extra May 1, 2025 → expires May 1, 2035

Licensee
Jeffrey A Markoff

Address
PO Box 6593
Laguna Niguel, CA 92607

FRN
0036820256

Last granted
May 1, 2025

Effective
Sep 29, 2026

Last action
Sep 29, 2026

Earlier addresses on this license:
until Sep 29, 2026: PO Box 6593, , Laguna Niguel, CA 92607-6593
FCC actions (4)
- Sep 29, 2026 — License modified LIMOD
- Sep 23, 2025 — License modified LIMOD
- May 1, 2025 — License issued LIISS
- May 1, 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 May 29, 2025 → Oct 11, 2026 · 5 snapshots · as KO6JCA
Jeffrey A Markoff
PO Box 6593
Laguna Niguel, CA 92607