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

Merlin Loudenburg

FRN 0013618426 · first licensed Jun 16, 2005 as KC0URQ · 5 licenses on record

📝 FCC applications (8)

Received	File number	Service	Purpose	Status	Call
Dec 19, 2016	0007595805	HAM	Modification	Granted	W0NJ
Feb 16, 2016	0007139631	HAM	Administrative update	Granted	W0NJ
Jun 9, 2008	0003465554	HAM	Administrative update	Granted	W0NJ
Dec 21, 2006	0002856653	HAM	Modification	Granted	AC9J
Mar 22, 2006	0002539153	HAM	Modification	Granted	W0MLL
Jun 23, 2005	0002214558	HAM	Modification	Granted	KC0URQ
Jun 17, 2005	0002207599	HAM	Modification	Granted	KC0URQ
Jun 16, 2005	0002205610	HAM	New license	Granted	KC0URQ

Complete licensing history

W0GHT Active Amateur Extra · vanity Jan 6, 2017 → expires Jan 6, 2027

Licensee
Merlin Loudenburg

Address
3916 N Potsdam Ave #4073
Sioux Falls, SD 57104-7048
43.5892, -96.6950 (street) · Grid EN13po · CQ 4 · ITU 7 · map ↗

FRN
0013618426

Previous call
W0NJ (General)

Last granted
Jan 6, 2017

Effective
Jan 6, 2017

Last action
Jan 6, 2017
FCC actions (2)
- Jan 6, 2017 — Vanity call sign granted VANGRT
- Jan 6, 2017 — License issued LIISS
📦 Moved: Saint Paul, MN → Sioux Falls, SD

W0NJ Canceled Amateur Extra · vanity Feb 8, 2007 → Jan 6, 2017 (canceled)

Licensee
Merlin Loudenburg

Address
3916 N Potsdam Ave #4073
Sioux Falls, SD 57104-7048
43.5892, -96.6950 (street) · Grid EN13po · CQ 4 · ITU 7 · map ↗

FRN
0013618426

Previous call
AC9J (General)

Last granted
Feb 8, 2007

Effective
Feb 17, 2016

Last action
Jan 6, 2017
FCC actions (5)
- Jan 6, 2017 — License canceled LICAN
- Feb 17, 2016 — Administrative update LIAUA
- Jun 10, 2008 — Administrative update LIAUA
- Feb 8, 2007 — Vanity call sign granted VANGRT
- Feb 8, 2007 — License issued LIISS
AC9J Canceled Amateur Extra · vanity Apr 11, 2006 → Feb 8, 2007 (canceled)

Licensee
Merlin L Loudenburg

Address
635 Maryland Ave W Apt 112
Saint Paul, MN 55117
45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗

FRN
0013618426

Previous call
W0MLL (General)

Last granted
Apr 11, 2006

Effective
Apr 11, 2006

Last action
Feb 8, 2007
FCC actions (3)
- Feb 8, 2007 — License canceled LICAN
- Apr 11, 2006 — Vanity call sign granted VANGRT
- Apr 11, 2006 — License issued LIISS
W0MLL Canceled Amateur Extra · vanity Jul 6, 2005 → Apr 11, 2006 (canceled)

Licensee
Merlin L Loudenburg

Address
635 Maryland Ave W - Apt 112
Saint Paul, MN 55117
45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗

FRN
0013618426

Previous call
KC0URQ (General)

Last granted
Jul 6, 2005

Effective
Jul 6, 2005

Last action
Apr 11, 2006
FCC actions (3)
- Apr 11, 2006 — License canceled LICAN
- Jul 6, 2005 — Vanity call sign granted VANGRT
- Jul 6, 2005 — License issued LIISS
KC0URQ Canceled Amateur Extra Jun 16, 2005 → Jul 6, 2005 (canceled)

Licensee
Merlin L Loudenburg

Address
635 Maryland Ave W - Apt 112
Saint Paul, MN 55117
45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗

FRN
0013618426

Last granted
Jun 16, 2005

Effective
Jun 23, 2005

Last action
Jul 6, 2005
FCC actions (4)
- Jul 6, 2005 — License canceled LICAN
- Jun 23, 2005 — License modified LIMOD
- Jun 16, 2005 — License issued LIISS
- Jun 16, 2005 — 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 Feb 26, 2016 → Oct 4, 2026 · 50 snapshots · as W0NJ
Merlin Loudenburg
3916 N Potsdam Ave #4073, Sioux Falls, SD 57104-7048
43.5892, -96.6950 (street) · Grid EN13po · CQ 4 · ITU 7 · map ↗
Seen May 27, 2010 → Oct 4, 2026 · 47 snapshots · as AC9J
Merlin L Loudenburg
635 Maryland Ave W Apt 112, Saint Paul, MN 55117
45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗
Seen May 27, 2010 → Oct 4, 2026 · 94 snapshots · as KC0URQ
Merlin L Loudenburg
635 Maryland Ave W - Apt 112, Saint Paul, MN 55117
45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗
Seen May 27, 2010 → Feb 16, 2016 · 19 snapshots · as W0NJ
Merlin Loudenburg
3700 S Westport Ave #4073, Sioux Falls, SD 57106-6360
43.5087, -96.8359 (ZIP center) · Grid EN13nm · CQ 4 · ITU 7 · map ↗

Repeaters within 50 miles

27 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
3.0	KE0WPC	Sioux Falls KE0WPC AllStar	443.8000	+5	DCS 174	FM (analog)	AllStar 632880	—	Sioux Falls, SD
3.0	KD0ZP	Sioux Falls KD0ZP EchoLink	444.9000	+5	TONE 146.2	FM (analog)	EchoLink 74079	—	Sioux Falls, SD
3.8	N0RCY	Sioux Falls SD N0RCY BM	429.0000	-1	CC1	DMR	BrandMeister 3193241	—	Sioux Falls, SD, L0C, SD
3.8	WD0EXR	Sioux Falls WD0EXR BM	443.4000	+5	CC1	DMR	BrandMeister 310165	—	Sioux Falls, SD
4.4	W0ZWY	Sioux Falls W0ZWY	146.8950	-0.6	TONE 146.2	FM (analog)		—	Sioux Falls, SD
4.4	W0ZWY	Sioux Falls W0ZWY	442.7500	+5	none	D-STAR		—	Sioux Falls, SD
4.4	W0FSD	Sioux Falls Menl W0FSD	223.8600	-1.6	TONE 146.2	FM (analog)		—	Sioux Falls, SD
4.4	KD0ZP	Sioux Falls Menl KD0ZP	444.8250	+5	TONE 103.5	FM (analog)		—	Sioux Falls, SD
5.4	KC0RFR	Sioux Falls KC0RFR	443.5000	+5	TONE 88.5	FM (analog) (FM,C4FM)		—	Sioux Falls, SD
5.9	W0ZML	Sioux Falls W0ZML AllStar	443.3000	+5	TONE 146.2	FM (analog) (DMR,FM)	AllStar 631740 BrandMeister 314644	—	Sioux Falls, SD
6.5	N4OGL	Sioux Falls N4OGL BM	446.5000	-5	CC1	DMR	BrandMeister 310677001	—	Sioux Falls, SD
25.2	KD0MC	Luverne KD0MC	147.1050	+0.6	TSQL 141.3	FM (analog)		—	Luverne, MN
27.4	N0JPE	Fairview N0JPE IRLP	146.5600	simplex	TONE 67.0	FM (analog)	IRLP 7449 IRLP 7375	—	Fairview, SD
29.3	W0ZML	Moe W0ZML	443.4000	+5	TSQL 146.2	FM (analog)		—	Moe, SD
34.1	W0DRK	Pipestone W0DRK	147.0750	+0.6	TONE 141.3	FM (analog)		—	Pipestone, MN
34.5	KB0WSV	Colman KB0WSV	443.2250	+5	TONE 146.2	FM (analog)		—	Colman, SD
35.4	KA0VHV	Beresford KA0VHV	147.2400	+0.6	TONE 141.3	FM (analog)		—	Beresford, SD
35.4	WG0F	Madison WG0F	442.7500	+5	none	D-STAR		—	Madison, SD
38.0	W0SD	Salem W0SD IRLP	145.5100	simplex	TONE 146.2	FM (analog)	IRLP 7748	—	Salem, SD
38.0	W0SD	Salem W0SD	442.0750	+5	TONE 103.5	FM (analog)		—	Salem, SD
39.4	W0VHQ	Rock Valley Perk W0VHQ	147.3000	+0.6	TSQL 110.9	FM (analog) (C4FM,FM)		—	Rock Valley, IA
41.3	W0SD	Turkey Ridge W0SD	444.9750	+5	TONE 146.2	FM (analog)		—	Turkey Ridge, SD
41.7	W0SD	Turkey Ridge W0SD	927.6000	-25	TONE 100.0	FM (analog)		—	Turkey Ridge, SD
6.2	W0ZWY offline	Sioux Falls W0ZWY	444.2000	+5	TSQL 82.5	FM (analog) (FM,C4FM)		—	Sioux Falls, SD
9.6	K0LTN offline	Harrisburg McFar K0LTN	442.4000	+5	TONE 225.7	FM (analog)		—	Harrisburg, SD
32.2	K0TGA offline	Flandreau K0TGA	146.9850	-0.6	TONE 146.2	FM (analog)		—	Flandreau, SD
35.3	KB0MRG offline	Madison KB0MRG	440.1750	+5	TONE 131.8	FM (analog)		—	Madison, SD

Vanity applications

Filed · Award	Applicant	Requested (in order)	Status
Filed Dec 19, 2016 Granted Jan 6, 2017 0007595805	W0NJ · Merlin Loudenburg · Amateur Extra 3916 N Potsdam Ave #4073, Sioux Falls, SD 57104-7048 43.5892, -96.6950 (street) · Grid EN13po · CQ 4 · ITU 7 · map ↗	1.W0GHT ✓ granted	Granted got W0GHT
Filed Dec 21, 2006 Award date was Jan 8, 2007 0002856653	AC9J · Merlin L Loudenburg · Amateur Extra 635 Maryland Ave W Apt 112, Saint Paul, MN 55117 45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗	1.W0NJ held	Granted
Filed Mar 22, 2006 Award date was Apr 9, 2006 0002539153	W0MLL · Merlin L Loudenburg · Amateur Extra 635 Maryland Ave W Apt 112, Saint Paul, MN 55117 45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗	1.AC9J held	Granted
Filed Jun 17, 2005 Award date was Jul 5, 2005 0002207599	KC0URQ · Merlin L Loudenburg · General 635 Maryland Ave W - Apt 112, Saint Paul, MN 55117 45.0036, -93.0913 (ZIP center) · Grid EN35ka · CQ 4 · ITU 7 · map ↗	1.W0MLL held	Granted