N9TPB FCC License Search
🕒 FCC license data updated today 7:16 am CDT (FCC files through Oct 7, 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)

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 23 hr ago 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 Oct 4, 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

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

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)
📖 In the printed callbooks since 1980 as N0BAK, before the FCC's online records

Callbook Records, 1993–2003
From the FCC amateur database as published on the QRZ! callsign CD-ROMs, 1993–2003, before and alongside the FCC's online records (which start in 1999). "Seen" dates are the first and last disc showing that record; the issue date is the FCC's, so it can be a renewal of an even older license.
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
N0BAK in the Printed Callbooks, 1909–1997
From scanned copies of the printed callbooks (government lists from 1913, then the Radio Amateur Callbook to 1997), read by OCR, so names and streets can carry typos. Each line is one or more editions in a row showing the same name at the same address.

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 · AwardApplicantRequested (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.

FiledAwardApplicantChoice #N0BAKResult
Jan 2, 2013 Jan 20, 2013 KD0SBL · Brett A Knudson · Rosemount, MN 1Granted Granted this call
Apr 1, 2005 Apr 19, 2005 W5CAN · KENNETH A POWELL II · Joplin, MO 2Not granted They got K0KCC (choice 1)

📡 On the Air: APRS, Digital & WSPR Spots

📍 APRS

N0BAK-9 · 23 hr ago · 6 mph · 869 ft
45.4545, -92.6372 · `_1
N0BAK-10 · 2 days ago
45.4548, -92.6373 · *Unified Radios*
Full history on aprs.fi →

Repeaters within 50 Miles

27 repeaters within 50 miles of this address, most active 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)
MilesCallNameOutputOffsetToneModeNetworksActivityLocation
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
6.2 W0ZWY Offline Sioux Falls
W0ZWY
 444.2000 +5 TSQL 82.5 FM (analog) (FM,C4FM) — Sioux Falls, SD
6.5 N4OGL Sioux Falls
N4OGL BM
 446.5000 -5 CC1 DMR BrandMeister 310677001 — Sioux Falls, SD
9.6 K0LTN Offline Harrisburg McFar
K0LTN
 442.4000 +5 TONE 225.7 FM (analog) — Harrisburg, 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
32.2 K0TGA Offline Flandreau
K0TGA
 146.9850 -0.6 TONE 146.2 FM (analog) — Flandreau, 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
35.3 KB0MRG Offline Madison
KB0MRG
 440.1750 +5 TONE 131.8 FM (analog) — Madison, 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