N9TPB FCC License Search

🕒 FCC license data updated today 6:02 am CDT (FCC files through Oct 2, 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

N0BAK HAM

Amateur Extra class licensed since 2012 (14 yrs) N0BAK since 2013 · previously KD0SBL Sioux Falls, SD grid EN13po LoTW user eQSL AG on APRS 27 min agoheard on PSK Reporter by 235 27 repeaters within 50 mi

🔒 Not available — currently licensed, through Jan 23, 2033. If it isn't renewed, it opens for vanity requests Jan 24, 2035.

📬 QSL: LoTW user · last upload Sep 18, 2026 · eQSL AG member · QRZ · HamQTH

📝 N0BAK has filed vanity applications before — latest filed Jan 2, 2013 · what was requested

Currently held by Brett A Knudson · 2 holders on record

Current holder: Brett A Knudson

Held N0BAK Jan 23, 2013 → present · first licensed May 23, 2012 as KD0SBL · 2 licenses · FRN 0021788831

📦 Moved: Rosemount, MN → Sioux Falls, SD

N0BAK Active Amateur Extra · vanity Jan 23, 2013 → expires Jan 23, 2033

Licensee
Brett A Knudson

Address
Attn: Brett Knudson
3916 N Potsdam Ave #394
Sioux Falls, SD 57104
43.5892, -96.6950 (street) · Grid EN13po · CQ 4 · ITU 7 · map ↗

FRN
0021788831

Previous call
KD0SBL (General)

Last granted
Nov 22, 2022

Effective
Nov 22, 2022

Last action
Nov 22, 2022
FCC actions (7)
- Nov 22, 2022 — License renewed LIREN
- Jul 12, 2022 — Administrative update LIAUA
- Sep 23, 2014 — Administrative update LIAUA
- Feb 20, 2014 — License modified LIMOD
- Jun 18, 2013 — License modified LIMOD
- Jan 23, 2013 — Vanity call sign granted VANGRT
- Jan 23, 2013 — License issued LIISS
KD0SBL Canceled Technician May 23, 2012 → Jan 23, 2013 (canceled)

Licensee
Brett A Knudson

Address
3832 Cardinal St W
Rosemount, MN 55068
44.7355, -93.0628 (ZIP center) · Grid EN34lr · CQ 4 · ITU 7 · map ↗

FRN
0021788831

Last granted
May 23, 2012

Effective
May 23, 2012

Last action
Jan 23, 2013
FCC actions (3)
- Jan 23, 2013 — License canceled LICAN
- May 23, 2012 — License issued LIISS
- May 23, 2012 — 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 Apr 27, 2024 → Sep 27, 2026 · 11 snapshots · as N0BAK
Brett A Knudson
Attn: Brett Knudson
3916 N Potsdam Ave #394, Sioux Falls, SD 57104
43.5892, -96.6950 (street) · Grid EN13po · CQ 4 · ITU 7 · map ↗
Seen May 28, 2012 → Sep 27, 2026 · 49 snapshots · as KD0SBL
Brett A Knudson
3832 Cardinal St W, Rosemount, MN 55068
44.7355, -93.0628 (ZIP center) · Grid EN34lr · CQ 4 · ITU 7 · map ↗
Seen Mar 28, 2015 → Apr 16, 2022 · 24 snapshots · as N0BAK
Brett A Knudson
Attn: Brett Knudson
3895 Cardinal Ct, Rosemount, MN 55068
44.7355, -93.0628 (ZIP center) · Grid EN34lr · CQ 4 · ITU 7 · map ↗

Previous holder: DAVID A GUDAHL

Held N0BAK Aug 7, 1990 → Aug 7, 2000 · first licensed Aug 7, 1990 as N0BAK · 1 license · no FRN on file (pre-2001 records)

N0BAK Expired Advanced Aug 7, 1990 → Aug 7, 2000 (expired)

Licensee
DAVID A GUDAHL

Address
217 SHADY OAK RD
HOPKINS, MN 55343
44.9144, -93.4163 (ZIP center) · Grid EN34hv · CQ 4 · ITU 7 · map ↗

Last granted
Aug 7, 1990

Effective
Aug 7, 1990

Last action
Aug 8, 2002
FCC actions (1)
- Aug 8, 2002 — License expired LIEXP

Address history

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

Seen Nov 7, 2004 → Sep 27, 2026 · 47 snapshots · as N0BAK
DAVID A GUDAHL
217 SHADY OAK RD, HOPKINS, MN 55343
44.9144, -93.4163 (ZIP center) · Grid EN34hv · CQ 4 · ITU 7 · map ↗

Vanity applications filed by N0BAK

Calls this licensee has asked the FCC for, newest first, in their order of preference. The FCC processes applications 18 days after filing; "likely award" is our estimate from every pending application in filing order.

Filed · Award	Applicant	Requested (in order)	Status
Filed Jan 2, 2013 Granted Nov 22, 2022 0005585785	KD0SBL · Brett A Knudson · Technician Attn: Brett Ardell Knudson · 3832 Cardinal St W, Rosemount, MN 55068 44.7355, -93.0628 (ZIP center) · Grid EN34lr · CQ 4 · ITU 7 · map ↗	1.N0BAK ✓ granted	Granted got N0BAK

Others requesting N0BAK

2 applications listed N0BAK as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Jan 2, 2013	Jan 20, 2013	KD0SBL · Brett A Knudson · Rosemount, MN	1	Granted
Apr 1, 2005	Apr 19, 2005	W5CAN · KENNETH A POWELL II · Joplin, MO	2	Granted

📡 On the air: APRS, digital & WSPR spots

📍 APRS

N0BAK-9 · 27 min ago · 5 mph · 935 ft

45.4545, -92.6372 · `_1

N0BAK-10 · 43 hr ago

45.4548, -92.6373 · *Unified Radios*

Full history on aprs.fi →

📤 Heard by others PSK Reporter

Heard by 235 stations (250 reports) · last 7 hr ago · FT8 · grid EN35QK

30m · 11915m · 128

Farthest: VK4MA, 8,610 miles on 15m FT8 (-13 dB)

PSK Reporter 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