N9TPB FCC License Search

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

AA0AF

Currently held by AARON S OSTERWYK · 2 holders on record

🗓 Active on 1 net · last heard Sep 27, 2026

Current holder: AARON S OSTERWYK

Held AA0AF Jan 6, 2026 → present · first licensed May 4, 2022 as KF0IZW · 2 licenses · FRN 0032132375

AA0AF Active Amateur Extra · vanity Jan 6, 2026 → expires Jan 6, 2036

Licensee
AARON S OSTERWYK

Address
4261 TIMBERRIDGE LN APT E
DULUTH, MN 55811-4045
46.8151, -92.1889 (street) · Grid EN36vt · CQ 4 · ITU 7 · map ↗

FRN
0032132375

Previous call
KF0IZW (General)

Last granted
Jan 6, 2026

Effective
Jan 6, 2026

Last action
Jan 6, 2026
FCC actions (2)
- Jan 6, 2026 — Vanity call sign granted VANGRT
- Jan 6, 2026 — License issued LIISS
KF0IZW Canceled Amateur Extra May 4, 2022 → Jan 6, 2026 (canceled)

Licensee
AARON S OSTERWYK

Address
4261 TIMBERRIDGE LN APT E
DULUTH, MN 55811-4045
46.8151, -92.1889 (street) · Grid EN36vt · CQ 4 · ITU 7 · map ↗

FRN
0032132375

Last granted
May 4, 2022

Effective
Nov 21, 2025

Last action
Jan 6, 2026
FCC actions (5)
- Jan 6, 2026 — License canceled LICAN
- Nov 21, 2025 — License modified LIMOD
- Feb 20, 2024 — License modified LIMOD
- May 4, 2022 — License issued LIISS
- May 4, 2022 — 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 · 12 snapshots · as KF0IZW
AARON S OSTERWYK
4261 TIMBERRIDGE LN APT E, DULUTH, MN 55811-4045
46.8151, -92.1889 (street) · Grid EN36vt · CQ 4 · ITU 7 · map ↗

Previous holder: Jonathan C Barrott

Held AA0AF Apr 18, 2017 → Jul 30, 2021 · first licensed Mar 23, 2017 as KE0MPO · 3 licenses · FRN 0026337980

📦 Moved: Castle Rock, CO → Calhan, CO

NX0K Active Amateur Extra · vanity Jul 30, 2021 → expires Jul 30, 2031

Licensee
Jonathan C Barrott

Address
23850 Texas Longhorn Trl
Calhan, CO 80808
38.8348, -104.3860 (street) · Grid DM78tu · CQ 4 · ITU 7 · map ↗

FRN
0026337980

Previous call
AA0AF (General)

Last granted
Jul 30, 2021

Effective
Apr 8, 2025

Last action
Apr 8, 2025
FCC actions (4)
- Apr 8, 2025 — FCC action LIAUA
- Jul 16, 2024 — FCC action LIAUA
- Jul 30, 2021 — Vanity call sign granted VANGRT
- Jul 30, 2021 — License issued LIISS
📦 Moved: Brighton, CO → Castle Rock, CO

AA0AF Canceled Amateur Extra · vanity Apr 18, 2017 → Jul 30, 2021 (canceled)

Licensee
Jonathan C Barrott

Address
5705 Palmer Dr.
Castle Rock, CO 80104
39.3021, -104.8197 (ZIP center) · Grid DM79oh · CQ 4 · ITU 7 · map ↗

FRN
0026337980

Previous call
KE0MPO (General)

Last granted
Apr 18, 2017

Effective
Jun 22, 2021

Last action
Jul 30, 2021
FCC actions (4)
- Jul 30, 2021 — License canceled LICAN
- Jun 22, 2021 — FCC action LIAUA
- Apr 18, 2017 — Vanity call sign granted VANGRT
- Apr 18, 2017 — License issued LIISS
KE0MPO Canceled Amateur Extra Mar 23, 2017 → Apr 18, 2017 (canceled)

Licensee
Jonathan C Barrott

Address
15125 E 117th Dr
Brighton, CO 80603
39.9511, -104.6602 (ZIP center) · Grid DM79qw · CQ 4 · ITU 7 · map ↗

FRN
0026337980

Last granted
Mar 23, 2017

Effective
Mar 28, 2017

Last action
Apr 18, 2017
FCC actions (4)
- Apr 18, 2017 — License canceled LICAN
- Mar 28, 2017 — License modified LIMOD
- Mar 23, 2017 — License issued LIISS
- Mar 23, 2017 — 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 25, 2025 → Sep 27, 2026 · 4 snapshots · as NX0K
Jonathan C Barrott
23850 Texas Longhorn Trl, Calhan, CO 80808
38.8348, -104.3860 (street) · Grid DM78tu · CQ 4 · ITU 7 · map ↗
Seen Apr 16, 2022 → Sep 27, 2026 · 20 snapshots · as AA0AF
Jonathan C Barrott
5705 Palmer Dr., Castle Rock, CO 80104
39.3021, -104.8197 (ZIP center) · Grid DM79oh · CQ 4 · ITU 7 · map ↗
Seen May 12, 2017 → Sep 27, 2026 · 28 snapshots · as KE0MPO
Jonathan C Barrott
15125 E 117th Dr, Brighton, CO 80603
39.9511, -104.6602 (ZIP center) · Grid DM79qw · CQ 4 · ITU 7 · map ↗

Nets

Net	When	Frequency	Role	Times	Last
Iowa D-Star Net	Sat 6:30 PM · Sat 9:15 PM CT	XLX632 A	Checked in	2	2026-09-27

From nets logged with NetLogger since the start of collection.

Repeaters within 50 miles

46 repeaters within 50 miles of this address, closest first · map these & export for a radio →

Miles	Call	Output	Offset	Tone	Mode	Networks	Location
3.4	KA0TMW	147.1800	+0.6	103.5	FM (analog)		Duluth, MN
3.7	W0GKP	146.9400	-0.6	TSQL 103.5	FM (analog)		Duluth, MN
3.7	W0GKP	444.1000	+5	none	FM (analog)		Duluth, MN
3.7	N0BZZ	442.8000	+5	none	FM (analog)		Duluth, MN
3.8	K0OE	902.1000	in 947.1000	CC1	DMR	BrandMeister 311355	Duluth, MN
3.8	AA0AW	444.9000	+5	DG-ID 00-00	Fusion (C4FM)	WIRES-X 52540	Duluth, MN
4.0	N0EO	444.3000	+5	TSQL 103.5	FM (analog)	WIRES-X 30494	Duluth, MN
4.1	N0BZZ	147.3300	+0.6	TSQL 151.4	FM (analog)		Proctor, MN
4.1	N0EO	442.2000	+5	none	D-STAR		Duluth, MN
4.1	N0EO	147.3750	+0.6	TSQL 103.5	FM (analog)		Duluth, MN
4.2	K0OE	444.8000	+5	CC1	DMR	BrandMeister 311164	Duluth, MN
4.3	K0QF	439.9750	in 424.9750	CC1	DMR	BrandMeister 319324301	Duluth, MN
6.2	KC0RTX	145.4500	-0.6	TSQL 103.5	FM (analog)		Duluth, MN
7.3	N0EO	145.3100	-0.6	TONE 110.9	FM (analog)	AllStar 47024 AllStar 47016	Superior, WI
9.9	WA9KLM	145.1700	-0.6	DG-ID 00-00	Fusion (C4FM)	WIRES-X 18373	Superior, WI
13.0	N0BZZ	145.4100	-0.6	none	FM (analog)		Duluth, MN
13.0	N0BZZ	53.0500	-1	none	FM (analog)		Duluth, MN
14.1	KB0YHX	443.1000	+5	none	FM (analog) (FM,C4FM)		Cloquet, MN
14.1	KB0YHX	145.2500	-0.6	none	FM (analog) (FM,C4FM)		Cloquet, MN
14.4	N0RPW	146.6700	-0.6	none	FM (analog)		Cloquet, MN
15.9	AA0AC	444.8500	+5	TSQL 141.3	FM (analog)	AllStar 56153	Cloquet, MN
22.1	NA0RC	147.1350	+0.6	TSQL 103.5	FM (analog)	AllStar 42251	Knife River, MN
24.6	KC0RTX	146.7900	-0.6	TSQL 103.5	FM (analog)		Carlton, MN
24.7	N0VOW	146.8950	-0.6	TSQL 82.5	FM (analog)		Holyoke, MN
25.9	N0VOW	146.8500	-0.6	TSQL 151.4	FM (analog)		Two Harbors, MN
27.8	N0LCR	444.5000	+5	TSQL 103.5	FM (analog)	WIRES-X 53060	Two Harbors, MN
27.8	N0LCR	53.0200	-1	TSQL 103.5	FM (analog)		Two Harbors, MN
28.0	N0BZZ	53.1700	-1	TSQL 103.5	FM (analog)		Mahtowa, MN
28.0	W0GKP	147.0000	-0.6	TSQL 103.5	FM (analog)		Mahtowa, MN
28.1	NA0RC	444.4000	+5	TSQL 103.5	FM (analog)	WIRES-X 11388	Knife River, MN
31.7	N0EO	145.4900	-0.6	TONE 110.9	FM (analog)	AllStar 470240	Duluth MN, WI
35.9	N0BZZ	147.2700	+0.6	TSQL 103.5	FM (analog)		Wales, MN
45.3	N0BZZ	443.2000	+5	TSQL 114.8	FM (analog)		Tamarack, MN
48.6	K5PFF	443.5000	+5	TSQL 141.3	FM (analog)		Gilbert, MN
48.9	AD0MI	443.4000	+5	DCS 172	FM (analog) (FM,P25)		Askov, MN
49.2	W0OJR	443.7000	+5	TSQL 151.4	FM (analog)		Virginia, MN
49.2	KD9EJA	146.9550	-0.6	TONE 146.2	FM (analog)	AllStar 56693	Askov MN, MN
49.7	KE0UAV	443.5500	+5	none	D-STAR		Silica, MN
49.7	KD0CI	146.9100	-0.6	TSQL 146.2	FM (analog)		Duxbury, MN
22.1	NA0RC offline	444.2000	+5	TSQL 103.5	FM (analog)		Knife River, MN
22.4	AB9AC offline	444.9000	+5	CC4	DMR	BrandMeister 312762	Foxboro, WI
48.6	NT0B offline	147.1500	+0.6	TSQL 151.4	FM (analog) (FM,P25)		Gilbert, MN
49.2	KB0CIM offline	145.1900	-0.6	TSQL 127.3	FM (analog)		Virgina, MN
49.2	KB0CIM offline	53.1900	-1	TSQL 146.2	FM (analog)		Virgina, MN
49.7	K0SLC offline	146.6850	-0.6	TSQL 151.4	FM (analog)		Virginia, MN
49.7	K0SLC offline	147.3150	+0.6	TSQL 151.4	FM (analog)		Virgina, MN

Vanity requests for AA0AF

8 applications listed AA0AF as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Dec 17, 2025	Jan 4, 2026	KF0IZW · AARON S OSTERWYK · DULUTH, MN	1	Granted
Jan 22, 2025	Feb 9, 2025	KG6VNX · Clay Vitus · Derry, NH	1	Dismissed
Jul 17, 2024	Aug 4, 2024	N7AEA · Arriel E Atienza · Sanford, NC	6	Granted
Jun 4, 2024	Jun 22, 2024	KE2BAR · Andrea Falgiani · Eatontown, NJ	4	Granted
Apr 19, 2024	May 7, 2024	KF0KUB · John H Funke · WAYNESVILLE, MO	2	Granted
Sep 15, 2023	Oct 3, 2023	AA5LR · JAMES P BARAD · Colorado Springs, CO	2	Granted
Mar 31, 2017	Apr 18, 2017	KE0MPO · Jonathan C Barrott · Brighton, CO	1	Granted
Nov 28, 2000	Dec 16, 2000	KI0GE · JOSEPH E MENKE · BANCROFT, IA	2	Granted