N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 15, 2026) · next update today 9:45 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)

W0KO HAM

Amateur Extra class licensed since 1988 (38 yrs) W0KO since 1996 · previously K0MAH, N0GFE Mandan, ND Grid DN96ms Heard on PSK Reporter by 30 13 repeaters within 50 mi

🔒 Not available — currently licensed, through Nov 4, 2036. If it isn't renewed, it opens for vanity requests Nov 5, 2038.

📬 QSL: no LoTW uploads on record · not eQSL AG · QRZ · HamQTH

📝 W0KO has filed vanity applications before — latest filed Jun 14, 2000 · what was requested

Currently held by M Fritz BERTELT · 1 holder on record

Current holder: M Fritz BERTELT

Held W0KO Nov 4, 1996 → present · first licensed Sep 20, 1988 as K0MAH · 3 licenses · FRN 0002362119
📖 In the printed callbooks since 1961 as K0MAH, before the FCC's online records

W0KO Active Amateur Extra · vanity Nov 4, 1996 → expires Nov 4, 2036

Licensee
M Fritz BERTELT

Address
4535 Trailblazer Loop
Mandan, ND 58554
46.7557, -100.9487 (ZIP center) · Grid DN96ms · CQ 4 · ITU 7 · map ↗

FRN
0005605480

Previous call
K0MAH (Advanced)

Last granted
Aug 11, 2026

Effective
Aug 11, 2026

Last action
Aug 11, 2026
FCC actions (5)
- Aug 11, 2026 — License renewed LIREN
- Oct 20, 2023 — Administrative update LIAUA
- Aug 10, 2016 — License renewed LIREN
- Sep 6, 2006 — License renewed LIREN
- May 25, 2001 — License modified LIMOD
📦 Moved: Brainerd, MN → Mandan, ND

K0MAH Active General · vanity Sep 20, 1988 → expires Jul 4, 2030

Licensee
JUDITH M BERTELT

Address
4535 Trailblazer Loop
Mandan, ND 58554
46.7557, -100.9487 (ZIP center) · Grid DN96ms · CQ 4 · ITU 7 · map ↗

FRN
0002362119

Previous call
N0GFE (Technician)

Last granted
Apr 27, 2020

Effective
Aug 7, 2025

Last action
Aug 7, 2025
FCC actions (5)
- Aug 7, 2025 — Administrative update LIAUA
- Apr 27, 2020 — License renewed LIREN
- Apr 24, 2010 — License renewed LIREN
- May 25, 2001 — License modified LIMOD
- Jul 4, 2000 — License issued LIISS
N0GFE Canceled General Sep 20, 1988 → Jul 4, 2000 (canceled)

Licensee
JUDITH M BERTELT

Address
2200 AHRENS HILL RD N
BRAINERD, MN 56401
46.3229, -94.1252 (ZIP center) · Grid EN26wh · CQ 4 · ITU 7 · map ↗

FRN
0002362119

Previous call
KA0TMZ (Technician)

Last granted
May 2, 2000

Effective
Jun 8, 2000

Last action
Jul 4, 2000
FCC actions (3)
- Jul 4, 2000 — License canceled LICAN
- Jun 8, 2000 — License modified LIMOD
- May 2, 2000 — License renewed LIREN

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.

Seen Nov 1, 2001 → Apr 17, 2003 · 4 discs
W0KO · Amateur Extra · issued May 25, 2001, expires Nov 4, 2006 · previously K0MAH
MANFRED F. BERTELT
16167 AHRENS HILL RD, BRAINERD, MN 56401
Seen Nov 1, 2001 → Apr 17, 2003 · 4 discs
K0MAH · General · issued May 25, 2001, expires Jul 4, 2010 · previously N0GFE
JUDITH M. BERTELT
16167 AHRENS HILL RD, BRAINERD, MN 56401
Seen Oct 31, 2000 → Apr 13, 2001 · 2 discs
K0MAH · General · issued Jul 4, 2000, expires Jul 4, 2010 · previously N0GFE
JUDITH M. BERTELT
2200 AHRENS HILL RD N, BRAINERD, MN 56401
Seen Apr 4, 1997 → Apr 13, 2001 · 8 discs
W0KO · Amateur Extra · issued Nov 4, 1996, expires Nov 4, 2006 · previously K0MAH (Advanced)
MANFRED F. BERTELT
2200 AHRENS HILL RD N, BRAINERD, MN 56401
Seen Oct 31, 1994 → May 2, 2000 · 11 discs
N0GFE · Technician Plus · issued Sep 20, 1988, expires Sep 20, 1998 · previously KA0TMZ (Novice)
JUDITH M. BERTELT
2200 AHRENS HILL RD N, BRAINERD, MN 56401
Seen Sep 9, 1993 → Oct 27, 1996 · 7 discs
K0MAH · Amateur Extra · issued Sep 20, 1988, expires Sep 20, 1998
MANFRED F BERTELT
2200 AHRENS HILL RD N, BRAINERD, MN 56401
Seen Sep 9, 1993 → May 3, 1994 · 2 discs
N0GFE · Technician · issued Sep 20, 1988, expires Sep 20, 1998 · previously KA0TMZ (Novice)
JUDITH M BERTELT
2200 AHRENS HILL RD N, BRAINERD, MN 56401

Address history

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

Seen Sep 25, 2025 → Oct 11, 2026 · 4 snapshots · as K0MAH
JUDITH M BERTELT
4535 Trailblazer Loop, Mandan, ND 58554
46.7557, -100.9487 (ZIP center) · Grid DN96ms · CQ 4 · ITU 7 · map ↗
Seen Apr 27, 2024 → Oct 11, 2026 · 13 snapshots · as W0KO
M Fritz BERTELT
4535 Trailblazer Loop, Mandan, ND 58554
46.7557, -100.9487 (ZIP center) · Grid DN96ms · CQ 4 · ITU 7 · map ↗
Seen Nov 7, 2004 → Oct 11, 2026 · 49 snapshots · as N0GFE
JUDITH M BERTELT
2200 AHRENS HILL RD N, BRAINERD, MN 56401
46.3229, -94.1252 (ZIP center) · Grid EN26wh · CQ 4 · ITU 7 · map ↗
Seen Nov 7, 2004 → May 29, 2025 · 45 snapshots · as K0MAH
JUDITH M BERTELT
16167 AHRENS HILL RD, BRAINERD, MN 56401
46.3229, -94.1252 (ZIP center) · Grid EN26wh · CQ 4 · ITU 7 · map ↗
Seen May 27, 2010 → Apr 16, 2022 · 35 snapshots · as W0KO
M Fritz BERTELT
16167 AHRENS HILL RD, BRAINERD, MN 56401
46.3229, -94.1252 (ZIP center) · Grid EN26wh · CQ 4 · ITU 7 · map ↗
Seen Nov 7, 2004 · 1 snapshot · as W0KO
MANFRED F BERTELT
Attn: MANFRED F BERTELT
16167 AHRENS HILL RD, BRAINERD, MN 56401
46.3229, -94.1252 (ZIP center) · Grid EN26wh · CQ 4 · ITU 7 · map ↗

Earlier Holders

W0KO in the 1993–2003 Callbooks

Seen Oct 27, 1996 · 1 disc
W0KO · Club / other

W0KO 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.

1986 · 1 edition
W0KO · class A
Nelson J Johnson
J!jb Sutton A•, Maplewood, MO 63143
Winter 1986 p.55
1980 → 1983 · 4 editions
W0KO · class A
Nelson J Johnson
3136 Sutton Av, Maplewood, MO 63143
Winter 1980 p.55, 1981 p.1080, Winter 1982 p.60, Winter 1983 p.59
1970 → 1976 · 4 editions
W0KO · class A
Nelson J Johnson
3136 Sutton Blvo, Maplewood Ho
Spring 1970 p.25, Winter 1972 p.32, 1974 p.625, Winter 1976 p.26
1969 · 1 edition
W0KO · class A
N E L S O N J J O H N S O N
3 1 3 6 S U T T O N B L V D, M A P L E W O O D Mo
Summer 1969 p.24
1968 · 1 edition
W0KO
O G Richard C. Hildebrandt
1 30 Loil. S Idn E Y St
Spring 1968 p.27
1952 → 1964 · 8 editions
W0KO
Nelson J. Johnson
3136 Sutton Blvd., Maplewood, MO
Fall 1952 p.34, Fall 1953 p.32, Fall 1954 p.13, Fall 1955 p.34, Summer 1958 p.23, Spring 1959 p.21, Spring 1961 p.23, Fall 1964 p.29
1951 · 1 edition
W0KO
Otto S. Mcdaniel
119 S. Woodlawn, Kirkwood 22, MO
Spring 1951 p.31
1949 → 1950 · 2 editions
W0KO
Nelson J
Johnson, 3136 Sutton, Maplewood, MO
Summer 1949 p.11, Summer 1950 p.10
None · 1 edition
W0KO
Poughkeepsie

None p.37
None · 1 edition
W0KO · class A
Nelson J Johnson
3136 Sutton Av, Maplewood Mo Kokqi T Robert B Larsen, 1705 N 70th Av, Omaha _, NE 68104
None p.625

Vanity Applications Filed by W0KO

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 Jun 14, 2000 Granted Apr 27, 2020 0000171258	N0GFE · JUDITH M BERTELT · General 2200 AHRENS HILL RD N, BRAINERD, MN 56401 46.3229, -94.1252 (ZIP center) · Grid EN26wh · CQ 4 · ITU 7 · map ↗	1.K0MAH ✓ Granted 2.K0JUD Never issued 3.K0JDY Held by JUDITH A GILLAM until Oct 14, 2026 4.N0JUD Never issued 5.K0JMB Held by Joshua M Brod until Jul 22, 2032	Granted got K0MAH

📡 On the Air: APRS, Digital & WSPR Spots

📤 Heard by others PSK Reporter

Heard by 30 stations (159 reports) · last 19 min ago · CW · grid EN26wi

30m · 920m · 2417m · 2115m · 8

Farthest: DG1ELE, 4,249 miles on 17m CW (6 dB)

PSK Reporter map →

Repeaters within 50 Miles

13 repeaters within 50 miles of this ZIP code, 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 · center is the ZIP code (approximate) · 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	Activity	Location
7.2	N0FAZ	Mandan Old Red N0FAZ	52.5250	simplex	none	FM (analog)	—	Mandan, ND
7.2	W0ZRT	Mandan W0ZRT	146.9400	-0.6	none	FM (analog)	—	Mandan, ND
7.2	N0FAZ	Mandan Old Red N0FAZ	444.2000	+5	TONE 103.5	FM (analog)	—	Mandan, ND
8.6	KC0AHL	Bismarck KC0AHL	444.6500	+5	TONE 107.2	FM (analog) (FM,C4FM)	—	Bismarck, ND
9.4	KF0NFI	Bismarck KF0NFI	443.1000	+5	CC0	DMR	—	Bismarck, ND
9.7	N0FAZ	Bismarck N0FAZ	224.2000	-1.6	TONE 103.5	FM (analog)	—	Bismarck, ND
12.3	W0ZRT	Bismarck KFYR W0ZRT	146.8500	-0.6	TONE 107.2	FM (analog)	—	Bismarck, ND
25.2	K0AVI	Bismarck K0AVI	443.5750	+5	none	FM (analog) (FM,C4FM)	—	Bismarck, ND
25.5	K6STS Offline	Bismarck K6STS	145.2800	-0.6	TONE 107.2	FM (analog) (FM,C4FM)	—	Bismarck, ND
29.9	KE0VF	Center KE0VF	444.9000	+5	none	FM (analog)	—	Center, ND
40.8	W0ZRT	Wing W0ZRT	446.9000	-5	none	FM (analog)	—	Wing, ND
40.8	W0ZRT	Wing Haystack W0ZRT	446.9500	-5	none	FM (analog)	—	Wing, ND
44.0	W0ZRT	Coal Creek Stati W0ZRT	145.4300	-0.6	TONE 107.2	FM (analog)	—	Coal Creek Station, ND