N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 5, 2026) · next update today 8:30 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

GREGORY MAXWELL

FRN 0017532847 · first licensed Mar 10, 2008 as KJ4CNK · 2 licenses on record

📻 GMRS licenses on this FRN

GMRS call	Status	Name	Location	Granted	Expires
WSLV888	Active	Greg Maxwell	Box Elder, SD	Feb 28, 2026	Feb 28, 2036

📝 FCC applications (8)

Received	File number	Service	Purpose	Status	Call
Feb 26, 2026	0011923918	GMRS	New license	Granted
Jan 30, 2026	0011890549	HAM	Administrative update	Granted	NT4TN
Mar 7, 2018	0008124424	HAM	Renewal	Granted	NT4TN
Jun 20, 2016	0007310189	HAM	Administrative update	Granted	NT4TN
Jul 14, 2008	0003501816	HAM	Administrative update	Granted	NT4TN
Apr 24, 2008	0003394857	HAM	Amendment	Granted	KJ4CNK
Apr 14, 2008	0003394795	HAM	Modification	Granted	KJ4CNK
Mar 10, 2008	0003353661	HAM	New license	Granted	KJ4CNK

Complete licensing history

📦 Moved: Herndon, VA → Box Elder, SD

NT4TN Active Amateur Extra · vanity May 13, 2008 → expires May 13, 2028

Licensee
GREGORY MAXWELL

Address
514 Americas Way #25117
Box Elder, SD 57719-7600
44.1038, -103.1455 (street) · Grid DN84kc · CQ 4 · ITU 7 · map ↗

FRN
0017532847

Previous call
KJ4CNK (General)

Last granted
Mar 8, 2018

Effective
Jan 31, 2026

Last action
Jan 31, 2026
FCC actions (6)
- Jan 31, 2026 — Administrative update LIAUA
- Mar 8, 2018 — License renewed LIREN
- Jun 21, 2016 — Administrative update LIAUA
- Jul 15, 2008 — Administrative update LIAUA
- May 13, 2008 — Vanity call sign granted VANGRT
- May 13, 2008 — License issued LIISS
KJ4CNK Canceled Amateur Extra Mar 10, 2008 → May 13, 2008 (canceled)

Licensee
GREGORY MAXWELL

Address
13055 LAUREL TREE LN, APT. 403
HERNDON, VA 20171
38.9269, -77.3968 (ZIP center) · Grid FM18hw · CQ 5 · ITU 8 · map ↗

FRN
0017532847

Last granted
Mar 10, 2008

Effective
Apr 14, 2008

Last action
May 13, 2008
FCC actions (4)
- May 13, 2008 — License canceled LICAN
- Apr 14, 2008 — License modified LIMOD
- Mar 10, 2008 — License issued LIISS
- Mar 10, 2008 — 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 NT4TN
GREGORY MAXWELL
514 Americas Way #25117, Box Elder, SD 57719-7600
44.1038, -103.1455 (street) · Grid DN84kc · CQ 4 · ITU 7 · map ↗
Seen May 27, 2010 → Oct 4, 2026 · 47 snapshots · as KJ4CNK
GREGORY MAXWELL
13055 LAUREL TREE LN, APT. 403, HERNDON, VA 20171
38.9269, -77.3968 (ZIP center) · Grid FM18hw · CQ 5 · ITU 8 · map ↗
Seen May 7, 2018 → Sep 25, 2025 · 15 snapshots · as NT4TN
GREGORY F MAXWELL
926A Diablo Ave #230, Novato, CA 94947
38.1037, -122.5725 (street) · Grid CM88rc · CQ 3 · ITU 6 · map ↗
Seen Jun 30, 2016 → Jan 2, 2018 · 9 snapshots · as NT4TN
GREGORY MAXWELL
201 San Antonio Circle Ste. 154, Mountain View, CA 94040
37.3803, -122.0852 (ZIP center) · Grid CM87wj · CQ 3 · ITU 6 · map ↗
Seen May 27, 2010 → Mar 16, 2016 · 21 snapshots · as NT4TN
GREGORY MAXWELL
719 Palmer Dr., HERNDON, VA 20170
38.9798, -77.3798 (ZIP center) · Grid FM18hx · CQ 5 · ITU 8 · map ↗

Repeaters within 50 miles

26 repeaters within 50 miles of this address, closest first · sort: closest · most active · map these & export for a radio →

● confirmed on the air · ● probably · ● reported off the air · ● unknown · ◉ this license · ring = 50 miles · click a dot for the repeater's page

● confirmed on the air · ● probably · ● reported off the air · no dot = unknown (hover a dot for the evidence)

Miles	Call	Name	Output	Offset	Tone	Mode	Networks	Activity	Location
3.1	W0BLK	Rapid City Radar W0BLK	146.9400	-0.6	TONE 146.2	FM (analog)		—	Rapid City, SD
3.1	W0BLK	Rapid City Radar W0BLK AllStar	444.5750	+5	TSQL 146.2	FM (analog)	AllStar 54962 EchoLink 732271	—	Rapid City, SD
3.1	KE0QIB	Rapid City Radar KE0QIB	444.7500	+5	TSQL 146.2	FM (analog)		—	Rapid City, SD
4.1	KF0MKE	Rapid City KF0MKE BM	434.5500	+5	CC1	DMR	BrandMeister 319937602	—	Rapid City, SD
29.9	K0HS	Custer Mt K0HS WIRES-X	444.1200	+5	DCS 025	FM (analog) (FM,C4FM)	WIRES-X 21493	—	Custer, SD
29.9	K0HS	Custer Mt K0HS	147.1200	+0.6	TSQL 146.2	FM (analog)		—	Custer, SD
32.4	WN6QJN	Custer WN6QJN	147.0900	+0.6	TSQL 146.2	FM (analog)		—	Custer, SD
32.5	K0ORK	Custer K0ORK WIRES-X	444.1200	+5	DG-ID 00-00	Fusion (C4FM)	WIRES-X 98878	—	Custer, SD
33.9	KC0BXH	Custer Bear Mtn KC0BXH	146.8500	-0.6	TONE 146.2	FM (analog)		—	Custer, SD
34.2	K0HS	Custer Bear Mtn K0HS	444.8500	+5	none	FM (analog)		—	Custer, SD
35.1	WB0JEK	Lead Terry Pk WB0JEK	443.6500	+5	TSQL 131.8	FM (analog)		—	Lead, SD
37.5	KC0BXH	Lead Terry Pk KC0BXH	146.7600	-0.6	TSQL 146.2	FM (analog)		—	Lead, SD
37.5	WB0JEK	Lead Terry Pk WB0JEK	147.0300	+0.6	TONE 146.2	FM (analog)		—	Lead, SD
37.5	KC0BXH	Lead Terry Pk KC0BXH	444.9750	+5	TSQL 146.2	FM (analog)		—	Lead, SD
44.8	K0HS	Custer Pass K0HS WIRES-X	147.1500	+0.6	TSQL 146.2	FM (analog) (FM,C4FM)	WIRES-X 21493	—	Custer, SD
44.8	K0ORK	Hot Springs K0ORK WIRES-X	147.7500	-0.6	DG-ID 00-00	Fusion (C4FM)	WIRES-X 92626	—	Hot Springs, SD
48.2	K0HS	Hot Springs Batt K0HS	146.7000	-0.6	TONE 146.2	FM (analog)		—	Hot Springs, SD
48.2	K0HS	Hot Springs Batt K0HS WIRES-X	444.7000	+5	DCS 025	FM (analog) (FM,C4FM)	WIRES-X 21493	—	Hot Springs, SD
48.3	K0ORK	Hot springs K0ORK WIRES-X	449.7000	-5	DG-ID 00-00	Fusion (C4FM)	WIRES-X 94494	—	Hot springs, SD
49.8	W0FUI	Hot Springs W0FUI IRLP	146.4750	simplex	TONE 146.2	FM (analog)	IRLP 7976	—	Hot Springs, SD
3.1	KE0QIB offline	Rapid City Radar KE0QIB BM	444.7000	+5	CC1	DMR	BrandMeister 312555	—	Rapid City, SD
4.5	W0RE offline	Rapid City W0RE	444.2000	+5	TSQL 146.2	FM (analog)		—	Rapid City, SD
5.2	WA0MFZ offline	Rapid City WA0MFZ IRLP	147.5700	simplex	TSQL 146.2	FM (analog)	IRLP 4044	—	Rapid City, SD
5.2	N6SGX offline	Rapid City N6SGX IRLP	446.0000	simplex	TSQL 100.0	FM (analog)	IRLP 3967	—	Rapid City, SD
10.3	K0LGB offline	RAPID CITY K0LGB IRLP	147.4700	simplex	TSQL 146.2	FM (analog)	IRLP 8701	—	RAPID CITY, SD
33.6	WN6QJN offline	Custer Bear Mtn WN6QJN	53.1700	-1	TSQL 146.2	FM (analog)		—	Custer, SD

Vanity applications

Filed · Award	Applicant	Requested (in order)	Status
Filed Apr 24, 2008 Granted Mar 8, 2018 0003394857	KJ4CNK · GREGORY MAXWELL · Amateur Extra 13055 LAUREL TREE LN, APT. 403, HERNDON, VA 20171 38.9269, -77.3968 (ZIP center) · Grid FM18hw · CQ 5 · ITU 8 · map ↗	1.NT4TN ✓ granted 2.W4ZD held 3.WK4R held 4.NE4EN 5.AC4L held 6.NE4GM 7.NT2I held 8.NE2D held 9.NT2N held 10.NU2E available	Granted got NT4TN