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

K4DUK HAM 📻 GMRS

📻

Also a GMRS licensee

WSJS657

Active until Aug 22, 2035 · same FCC Registration Number (FRN) · GMRS covers the licensee's immediate family

General class licensed since 2025 (1 yr) K4DUK since 2026 · previously KK4DUK, KR4GPU Lake City, FL grid EM80rc GMRS WSJS657 98 repeaters within 50 mi

🔒 Not available — currently licensed, through Aug 11, 2036. If it isn't renewed, it opens for vanity requests Aug 12, 2038.

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

📝 K4DUK has filed vanity applications before — latest filed Jul 24, 2026 · what was requested

Currently held by Frederic Ducksworth · 2 holders on record

Current holder: Frederic Ducksworth

Held K4DUK Aug 11, 2026 → present · first licensed Sep 9, 2025 as KR4GPU · 3 licenses · FRN 0037418662

K4DUK Active General · vanity Aug 11, 2026 → expires Aug 11, 2036

Licensee
Frederic Ducksworth

Address
Attn: Fred Ducksworth
1468 SW Main Blvd Ste 105 Pmb 3
Lake City, FL 32025-1116
30.1040, -82.5662 (ZIP center) · Grid EM80rc · CQ 5 · ITU 8 · map ↗

FRN
0037418662

Previous call
KK4DUK (Technician)

Last granted
Aug 11, 2026

Effective
Aug 11, 2026

Last action
Aug 11, 2026
FCC actions (2)
- Aug 11, 2026 — Vanity call sign granted VANGRT
- Aug 11, 2026 — License issued LIISS
KK4DUK Canceled General · vanity Dec 9, 2025 → Aug 11, 2026 (canceled)

Licensee
Frederic Ducksworth

Address
1468 SW Main Blvd Ste 105 Pmb 3
Lake City, FL 32025-1116
30.1040, -82.5662 (ZIP center) · Grid EM80rc · CQ 5 · ITU 8 · map ↗

FRN
0037418662

Previous call
KR4GPU (Technician)

Last granted
Dec 9, 2025

Effective
Dec 9, 2025

Last action
Aug 11, 2026
FCC actions (3)
- Aug 11, 2026 — License canceled LICAN
- Dec 9, 2025 — Vanity call sign granted VANGRT
- Dec 9, 2025 — License issued LIISS
KR4GPU Canceled General Sep 9, 2025 → Dec 9, 2025 (canceled)

Licensee
Frederic Ducksworth

Address
1468 SW Main Blvd Ste 105 Pmb 3
Lake City, FL 32025-1116
30.1040, -82.5662 (ZIP center) · Grid EM80rc · CQ 5 · ITU 8 · map ↗

FRN
0037418662

Last granted
Sep 9, 2025

Effective
Sep 29, 2025

Last action
Dec 9, 2025
FCC actions (4)
- Dec 9, 2025 — License canceled LICAN
- Sep 29, 2025 — License modified LIMOD
- Sep 9, 2025 — License issued LIISS
- Sep 9, 2025 — 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 Sep 25, 2025 → Oct 4, 2026 · 7 snapshots · as KR4GPU
Frederic Ducksworth
1468 SW Main Blvd Ste 105 Pmb 3, Lake City, FL 32025-1116
30.1040, -82.5662 (ZIP center) · Grid EM80rc · CQ 5 · ITU 8 · map ↗

Previous holder: ROBERT E DUCK

Held K4DUK Jul 13, 2004 → Jul 13, 2024 · first licensed Jul 28, 2003 as N3ZYI · 2 licenses · FRN 0009362070

K4DUK Expired General · vanity Jul 13, 2004 → Jul 13, 2024 (expired)

Licensee
ROBERT E DUCK

Address
26 SWAMP FOX DR
CAROLINA SHORES, NC 28467
33.9180, -78.5920 (ZIP center) · Grid FM03qw · CQ 5 · ITU 8 · map ↗

FRN
0009362070

Previous call
N3ZYI (Technician)

Last granted
Apr 26, 2014

Effective
Apr 26, 2014

Last action
Jul 14, 2026
FCC actions (7)
- Jul 14, 2026 — License expired LIEXP
- Apr 26, 2014 — License renewed LIREN
- Oct 13, 2005 — Administrative update LIAUA
- Nov 22, 2004 — License modified LIMOD
- Jul 16, 2004 — Administrative update LIAUA
- Jul 13, 2004 — Vanity call sign granted VANGRT
- Jul 13, 2004 — License issued LIISS
N3ZYI Canceled Technician Jul 28, 2003 → Jul 13, 2004 (canceled)

Licensee
ROBERT E DUCK

Address
29 Swamp Fox Drive
Carolina Shores, NC 28467-2583
33.9180, -78.5920 (ZIP center) · Grid FM03qw · CQ 5 · ITU 8 · map ↗

FRN
0009362070

Previous call
KB4PRE (Technician Plus)

Last granted
Jul 28, 2003

Effective
Jun 25, 2004

Last action
Jul 13, 2004
FCC actions (5)
- Jul 13, 2004 — License canceled LICAN
- Jun 25, 2004 — Administrative update LIAUA
- Jun 25, 2004 — Administrative update LIAUA
- Jul 28, 2003 — License renewed LIREN
- Jul 28, 2003 — FCC action LITIN

Address history

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

Seen May 27, 2010 → Oct 4, 2026 · 47 snapshots · as K4DUK
ROBERT E DUCK
26 SWAMP FOX DR, CAROLINA SHORES, NC 28467
33.9180, -78.5920 (ZIP center) · Grid FM03qw · CQ 5 · ITU 8 · map ↗
Seen Nov 7, 2004 → Oct 4, 2026 · 49 snapshots · as N3ZYI
ROBERT E DUCK
29 Swamp Fox Drive, Carolina Shores, NC 28467-2583
33.9180, -78.5920 (ZIP center) · Grid FM03qw · CQ 5 · ITU 8 · map ↗

Vanity applications filed by K4DUK

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 Jul 24, 2026 Granted Aug 11, 2026 0012127126	KK4DUK · Frederic Ducksworth · General Attn: Fred Ducksworth · 1468 SW Main Blvd Ste 105 Pmb 3, Lake City, FL 32025-1116 30.1040, -82.5662 (ZIP center) · Grid EM80rc · CQ 5 · ITU 8 · map ↗	1.K4DUK ✓ granted	Granted got K4DUK
Filed Sep 23, 2025 Granted Dec 9, 2025 0011762379	KR4GPU · Frederic Ducksworth · Technician 1468 SW Main Blvd Ste 105 Pmb 3, Lake City, FL 32025-1116 30.1040, -82.5662 (ZIP center) · Grid EM80rc · CQ 5 · ITU 8 · map ↗	1.KK4DUK ✓ granted	Granted got KK4DUK

Others requesting K4DUK

2 applications listed K4DUK as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Jul 24, 2026	Aug 11, 2026	KK4DUK · Frederic Ducksworth · Lake City, FL	1	Granted
Jun 24, 2004	Jul 12, 2004	N3ZYI · ROBERT E DUCK · FREDERICK, MD	1	Granted

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for K4DUK in the last 24 hours. They show up here within seconds of K4DUK beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.

📻 GMRS repeaters within 50 miles

4 on the air or of unknown status, closest first · map these & export for a GMRS radio →

Miles	Channel	Output	Tone in	Owner	Location	Access	Status
6	RP17	462.600	141.3	WSFX355	Lake City, FL	Open	On the air
15	RP19	462.650	141.3	WSFX355	Lake Butler, FL	Open	On the air
29	RP15	462.550	141.3	WROL455	Gainesville, FL · Wcjb-tv Tower	Open	On the air
31	RP21	462.700	141.3	WRWR389	Gainesville, FL	Open	Unknown

Repeaters within 50 miles

98 repeaters within 50 miles of this ZIP code, 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 · 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	Networks	Activity	Location
5.0	NF4CA	Lake City NF4CA	147.1500	+0.6	TSQL 110.9	D-STAR		—	Lake City, FL
5.3	NF4CQ	Lake City NF4CQ	147.1500	+0.6	TONE 110.9	FM (analog)		—	Lake City, FL
5.7	KE4BQI	Lake City KE4BQI	53.1700	-1	TONE 123.0	FM (analog)		—	Lake City, FL
5.9	KO4WOG	Lake City KO4WOG	444.6000	+5	TONE 123.0	FM (analog)		—	Lake City, FL
6.9	KO4WOG	Lake City KO4WOG	224.1400	-1.6	TSQL 123.0	FM (analog)		—	Lake City, FL
7.4	KN4YGT	Lake City KN4YGT BM	442.4250	+5	CC6	DMR	BrandMeister TGIF	—	Lake City, FL
7.4	KN4YGT	Lake City KN4YGT AllStar	444.8750	+5	TONE 123.0	FM (analog) (C4FM,FM)	AllStar 530512	—	Lake City, FL
7.4	WA4ZFQ	Lake City WA4ZFQ	146.9400	-0.6	TONE 123.0	FM (analog)		—	Lake City, FL
7.4	KN4YGT	Lake City KN4YGT	439.9000	simplex	none	D-STAR		—	Lake City, FL
7.6	NF4CA	Lake City NF4CA	147.1800	+0.6	TONE 123.0	FM (analog)		—	Lake City, FL
9.9	WT2Y	Lake City WT2Y	147.1800	+0.6	TONE 123.0	FM (analog)		—	Lake City, FL
11.5	NF4CQ	Lake City NF4CQ	444.9000	+5	TONE 110.9	FM (analog)		—	Lake City, FL
11.7	NF4CQ	Lake City NF4CQ	145.4900	-0.6	none	FM (analog)		—	Lake City, FL
13.1	KF4JMM	Southport KF4JMM	444.0750	+5	TONE 103.5	FM (analog)		—	Southport, FL
13.9	KO4WOG	Lake Butler Unio KO4WOG	146.7300	-0.6	TSQL 123.0	FM (analog)		—	Lake Butler, FL
14.7	KJ4LSY	Lake city KJ4LSY	145.5850	simplex	none	FM (analog)		—	Lake city, FL
19.6	KB4MS	High Springs KB4MS	145.4700	-0.6	TONE 123.0	FM (analog)		—	High Springs, FL
21.1	WA4QLA	High Springs Poe WA4QLA	53.0900	-1	TSQL 123.0	FM (analog)		—	High Springs, FL
21.2	KZ4JN	Alachua KZ4JN BM	444.6375	+5	CC1	DMR	BrandMeister 321823801	—	Alachua, FL
21.9	NF4EC	Spring Ridge NF4EC	147.2850	+0.6	TSQL 123.0	FM (analog)		—	Spring Ridge, FL
22.2	WA8ZYT	High Springs WA8ZYT AllStar	224.9000	-1.6	TONE 123.0	FM (analog)	AllStar 537861	—	High Springs, FL
25.1	N4ASO	Gainesville N4ASO	146.8875	-0.6	none	FM (analog)		—	Gainesville, FL
25.1	N4ASO	Gainesville N4ASO	444.7250	+5	none	FM (analog)		—	Gainesville, FL
25.1	N4ASO	Gainesville N4ASO	1293.0000	-20	none	FM (analog) (DV,FM)		—	Gainesville, FL
25.3	W4DNQ	Macclenny W4DNQ BM	442.8750	+5	CC1	DMR	BrandMeister 311006	—	Macclenny, FL
25.4	W4DNQ	Macclenny W4DNQ AllStar	447.8750	simplex	TONE 127.3	FM (analog)	AllStar 50710 AllStar 507100 AllStar 507101	—	Macclenny, FL
26.0	K4GET	Jasper K4GET AllStar	147.4800	simplex	TONE 110.9	FM (analog)	AllStar 69977 AllStar 699770	—	Jasper, FL
26.8	KE4HDG	Bell KE4HDG	147.2850	+0.6	TONE 123.0	FM (analog)		—	Bell, FL
26.8	W4DAK	Bell W4DAK	443.9500	+5	TONE 123.0	FM (analog)		—	Bell, FL
27.0	W2DWR	Live Oak W2DWR	442.5000	+5	TONE 123.0	FM (analog)		—	Live Oak, FL
28.2	N4SVC	Live Oak N4SVC	145.4100	-0.6	TONE 100.0	FM (analog) (C4FM,FM)		—	Live Oak, FL
28.2	N4SVC	Live Oak N4SVC	442.9250	+5	TSQL 127.3	FM (analog)		—	Live Oak, FL
29.0	W4YIL	Macclenny W4YIL	147.0900	+0.6	TONE 127.3	FM (analog)		—	Macclenny, FL
29.1	AB4GE	Macclenny AB4GE	444.0750	+5	TSQL 100.0	FM (analog)		—	Macclenny, FL
29.1	AB4GE	Macclenny AB4GE IRLP	147.0900	+0.6	TSQL 100.0	FM (analog)	IRLP 4567	—	Macclenny, FL
29.1	KD4DRP	Gainesville WCJB KD4DRP P25	442.0125	+5	none	FM (analog) (DMR,DV,FM,P25)	P25	—	Gainesville, FL
29.1	KC4MHH	Gainesville WCJB KC4MHH WIRES-X	444.0750	+5		Fusion (C4FM)	WIRES-X 11234	—	Gainesville, FL
29.1	KC4NWK	Gainesville WCJB KC4NWK AllStar	444.5875	+5	TSQL 123.0	FM (analog)	AllStar 577590 EchoLink 128466	—	Gainesville, FL
29.1	KC4MHH	Gainesville WCJB KC4MHH AllStar	444.9875	+5	TSQL 123.0	FM (analog) (DMR,FM)	AllStar 570380 IRLP 5703	—	Gainesville, FL
29.1	K4GNV	Gainesville Devi K4GNV	146.9850	-0.6	TONE 123.0	FM (analog)		—	Gainesville, FL
29.1	K4GNV	Gainesville Devi K4GNV	146.8200	-0.6	TONE 123.0	FM (analog)		—	Gainesville, FL
29.1	K4GNV	Gainesville WCJB K4GNV	224.1600	-1.6	TONE 123.0	FM (analog)		—	Gainesville, FL
29.1	K4GNV Listed as K4GNV DMR	Gainesville K4GNV BM	146.6850	-0.6	CC1	DMR	BrandMeister 312571	—	Gainesville, FL
29.2	K4BAR	Starke BC EOC K4BAR	145.1500	-0.6	TSQL 127.3	FM (analog)		—	Starke, FL
29.2	KJ4RYI	Starke KJ4RYI	145.3800	+0.6	none	D-STAR		—	Starke, FL
29.5	KM4CFZ	Starke KM4CFZ	443.8000	+5	TSQL 127.3	FM (analog)		—	Starke, FL
29.9	KC4GOL	Live Oak KC4GOL IRLP	443.6000	+5	TSQL 127.3	FM (analog) (DMR,FM)	EchoLink 198563 IRLP 8334 BrandMeister 111221	—	Live Oak, FL
30.3	KD4MGR	Gainesville KD4MGR BM	146.8500	-0.6	TONE 123.0	FM (analog) (DMR,FM)	BrandMeister 314539	—	Gainesville, FL
30.4	K4EL	Starke K4EL	146.7300	-0.6	TONE 127.3	FM (analog)		—	Starke, FL
30.4	K4EL	Starke K4EL	444.0000	+5	TONE 127.3	FM (analog)		—	Starke, FL
30.4	W4SA	Starke W4SA	442.2750	+5	TONE 123.0	FM (analog)		—	Starke, FL
30.4	KC4GOL	Live Oak KC4GOL	442.9250	+5	TONE 127.3	FM (analog)		—	Live Oak, FL
30.4	K4EAC	Gainesville K4EAC	146.7900	-0.6	none	FM (analog)		—	Gainesville, FL
32.1	KC4MHH	Gainesville KC4MHH BM	147.2700	+0.6	CC1	DMR	BrandMeister 312558	—	Gainesville, FL
33.6	K4GNV	Gainesville Devi K4GNV	444.9250	+5	TONE 123.0	FM (analog)		—	Gainesville, FL
34.4	KC4NWK	Gainesville KC4NWK WIRES-X	444.5250	+5	CC1	DMR (C4FM,DMR)	WIRES-X 94443 TGIF	—	Gainesville, FL
34.4	W4DFU	Gainesville W4DFU EchoLink	146.9100	-0.6	TONE 123.0	FM (analog)	EchoLink 258454	—	Gainesville, FL
34.4	W4DFU	Gainesville W4DFU K4USD-Net	444.8125	+5	CC1	DMR	K4USD-Net	—	Gainesville, FL
34.6	KJ4CX	Jacksonville KJ4CX BM	434.3400	+5	CC1	DMR	BrandMeister 311230201	—	Jacksonville, FL
34.7	W4DFU Listed as W4DFU-3	Gainesville W4DFU	144.3900	simplex	CC?	DMR		—	Gainesville, FL
34.9	KC4MHH	Gainesville WCJB KC4MHH EchoLink	146.6400	-0.6	CC1	DMR	EchoLink 32601 BrandMeister 313061	—	Gainesville, FL
34.9	KC4MHH	Gainesville WCJB KC4MHH BM	444.8375	+5	TSQL 123.0	FM (analog) (DMR,FM)	BrandMeister 312812	—	Gainesville, FL
35.4	KR4HO	Live Oak KR4HO	443.7000	+5	TONE 110.9	FM (analog)		—	Live Oak, FL
36.6	no call listed	Jasper Florida	441.4250	+5	TONE 103.5	FM (analog)		—	Jasper, FL
37.1	N4TSV	Trenton N4TSV	921.2000	-12	none	FM (analog)		—	Trenton, FL
37.6	K4GET	Jasper K4GET AllStar	441.4250	+5	TONE 103.5	FM (analog)	AllStar 29888 IRLP 8091 AllStar 28165	—	Jasper, FL
38.0	W4COJ	Jacksonville W4COJ	444.2750	+5	TONE 127.3	FM (analog)		—	Jacksonville, FL
38.8	W2TTT	Live Oak I1E 275 W2TTT	145.2700	-0.6	none	FM (analog)		—	Live Oak, FL
40.6	WB4EN	Keystone Heights WB4EN	444.6500	+5	none	FM (analog)		—	Keystone Heights, FL
41.2	WB4EN	Keystone Heights WB4EN	145.1300	-0.6	TSQL 100.0	FM (analog)		—	Keystone Heights, FL
41.4	WD4NYT	Middleburg WD4NYT	53.2100	-1	TONE 141.3	FM (analog)		—	Middleburg, FL
41.4	WD4NYT	Middleburg WD4NYT	145.1100	-0.6	TONE 127.3	FM (analog)		—	Middleburg, FL
42.1	KI4UWC	Keys Co Roads Ya KI4UWC	147.2250	+0.6	TSQL 156.7	FM (analog)	🗓 1 net	1 net	Keystone Heights, FL
42.5	W4NAS	Bryceville W4NAS AllStar	146.8350	-0.6	TSQL 127.3	FM (analog) (C4FM,FM)	AllStar 10000 EchoLink 146835 IRLP 12345 WIRES-X 28016	—	Bryceville, FL
43.5	N4RVD	Middleburg N4RVD	224.0000	-1.6	none	FM (analog)		—	Middleburg, FL
44.1	KB4MS	Old Town KB4MS	146.7000	-0.6	TONE 123.0	FM (analog)		—	Old Town, FL
45.6	K3YAN	Hawthorne K3YAN	147.1050	+0.6	TSQL 123.0	FM (analog)		—	Hawthorne, FL
45.6	WB4MBU	Hawthorne WB4MBU	444.1500	+5	TONE 123.0	FM (analog)		—	Hawthorne, FL
46.4	WB4CGD	Orange Park WB4CGD	146.6700	-0.6	TONE 123.0	FM (analog)		—	Orange Park, FL
46.4	K4BT	Orange Park WAYR K4BT	146.6700	-0.6	TSQL 127.3	FM (analog) (FM,C4FM)		—	Orange Park, FL
46.9	KB4CKC	Jacksonville KB4CKC	147.1800	+0.6	none	FM (analog)		—	Jacksonville, FL
46.9	W4DAK	Chiefland W4DAK	147.3900	+0.6	TSQL 123.0	FM (analog)		—	Chiefland, FL
47.1	W4NEK	Orange Park W4NEK	147.2550	+0.6	TONE 127.3	FM (analog)		—	Orange Park, FL
47.2	KI4UWC	Orange Park Flem KI4UWC EchoLink	146.9250	-0.6	TSQL 156.7	FM (analog)	EchoLink 465626 🗓 1 net	1 net	Orange Park, FL
47.4	K4PRY	Hines K4PRY	146.7450	-0.6	TSQL 94.8	FM (analog)		—	Hines, FL
48.3	NS4R	Jacksonville NS4R	29.6400	-0.1	TONE 103.5	FM (analog)		—	Jacksonville, FL
48.3	NS4R	Jacksonville NS4R	53.0300	-1	TONE 103.5	FM (analog)		—	Jacksonville, FL
48.3	NS4R	Jacksonville NS4R	145.4500	-0.6	TONE 103.5	FM (analog)		—	Jacksonville, FL
48.3	NS4R	Jacksonville NS4R	224.9400	-1.6	TONE 103.5	FM (analog)		—	Jacksonville, FL
48.3	NS4R	Jacksonville NS4R	444.1000	+5	TONE 103.5	FM (analog)		—	Jacksonville, FL
48.9	KM4TTS	Lee KM4TTS	442.0000	+5	TONE 123.0	FM (analog)		—	Lee, FL
48.9	KM4TTS	Lee KM4TTS	145.1900	-0.6	TSQL 123.0	FM (analog)		—	Lee, FL
49.0	W1JXG	Lee W1JXG	145.1100	-0.6	TSQL 123.0	FM (analog)		—	Lee, FL
49.5	KM4AX	McIntosh KM4AX	147.1650	+0.6	none	FM (analog)		—	McIntosh, FL
49.6	WB4CGD	Orange Park WB4CGD	444.5000	+5	TONE 127.3	FM (analog)		—	Orange Park, FL
49.7	KK4ECR	Orange Park Hosp KK4ECR C-Bridge	443.0875	+5	CC1	DMR	C-Bridge 🗓 2 nets	2 nets · 17 check-ins · 14 stations	Orange Park, FL
17.5	W1QBI offline	Wellborn W1QBI EchoLink	145.2700	-0.6	TSQL 123.0	FM (analog)	EchoLink 509130	—	Wellborn, FL
34.4	KC4MHH offline	Gainesville KC4MHH	146.6850	+0.6	CC?	DMR		—	Gainesville, FL