N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 18, 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)

Mark B Carlson

FRN 0016100943 · first licensed Feb 13, 2007 as N3ZFO · 1 license on record

📻 GMRS Licenses on This FRN

GMRS call	Status	Name	Location	Granted	Expires
WSMD895	Active	Mark B Carlson	Dover, DE	Mar 24, 2026	Mar 24, 2036

📝 FCC Applications (5)

Received	File number	Service	Purpose	Status	Call
Mar 23, 2026	0011955822	GMRS	New license	Granted
Apr 1, 2025	0011509179	HAM	Administrative update	Granted	N3ZFO
Mar 16, 2018	0008135775	HAM	Modification	Granted	N3ZFO
Mar 20, 2017	0007705093	HAM	Renewal	Granted	N3ZFO
Feb 13, 2007	0002911254	HAM	Renewal	Granted	N3ZFO

Complete Licensing History

N3ZFO Active General Feb 13, 2007 → expires Apr 29, 2027

Licensee
Mark B Carlson

Address
Attn: Mark B Carlson
PO Box 625
Dover, DE 19903

FRN
0016100943

Last granted
Mar 20, 2017

Effective
Apr 2, 2025

Last action
Apr 2, 2025
FCC actions (5)
- Apr 2, 2025 — Administrative update LIAUA
- Mar 16, 2018 — License modified LIMOD
- Mar 20, 2017 — License renewed LIREN
- Feb 13, 2007 — License renewed LIREN
- Feb 13, 2007 — FCC action LITIN

Address history

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

Seen Apr 25, 2025 → Oct 18, 2026 · 7 snapshots · as N3ZFO
Mark B Carlson
Attn: Mark B Carlson
PO Box 625
Dover, DE 19903
Seen Nov 7, 2004 → Mar 13, 2025 · 43 snapshots · as N3ZFO
MARK B CARLSON
1532 ALLEY CORNER RD, CLAYTON, DE 19938
39.2565, -75.6988 (ZIP center) · Grid FM29dg · CQ 5 · ITU 8 · map ↗

Nets

Net	When	Frequency	Role	Times	Last
KCARC INFO AND TRAFFIC NET	Wed 6:30 PM · Wed 6:45 PM ET	146.91	Checked in	6	2026-10-14
KCARC ARES NET	Sat 8:30 AM · Sat 8:45 AM ET	146.91	Checked in	4	2026-10-17
DELMARVA 8802 DMR NET	Mon 7:30 PM · Mon 7:45 PM ET	TG 8802	Checked in	4	2026-10-12
Just For Fun Net - KCARC	Tue 6:30 PM · Tue 6:45 PM ET	146.91	Checked in	2	2026-09-29
Weekly KCARCy Info_Traffic net	Wed 6:45 PM ET	146.910	Checked in	1	2026-10-07
DelMarva 8802 net - C_Bridge	Mon 7:30 PM · Mon 7:45 PM ET	8802	Checked in	1	2026-10-05
The Just for Fun Net (KCARC)	Tue 6:45 PM ET	146.91	Checked in	1	2026-09-15
KCARC Just For Fun Net	Tue 6:30 PM ET	146.91	Checked in	1	2026-09-01

From nets logged with NetLogger since the start of collection.