N9TPB FCC License Search
🕒 FCC license data updated today 9:42 am CDT (FCC files through Sep 30, 2026) · next update tomorrow 9:15 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

K3DU

🔒 Not available — currently licensed, through Jun 20, 2030. If it isn't renewed, it opens for vanity requests Jun 21, 2032.

📬 QSL: LoTW user, last upload Dec 30, 2025 · eQSL AG as W3VKD

📝 K3DU has filed vanity applications before — latest filed Jun 2, 2020 · what was requested

Currently held by Victor K Dubitsky · 2 holders on record

Current holder: Victor K Dubitsky

Held K3DU Jun 20, 2020 → present · first licensed Dec 14, 2009 as KB3TTO · 3 licenses · FRN 0019407410

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

Previous holder: CHARLES W HANSON

Held K3DU Dec 5, 2006 → May 21, 2018 · first licensed Dec 5, 2006 as K3DU · 1 license · FRN 0015809759

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

Vanity applications filed by K3DU

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 Jun 2, 2020
Granted Jun 20, 2020
0009098200
 W3VKD · Victor K Dubitsky · Amateur Extra
4219 Landgreen street, Rockville, MD 20853
39.0829, -77.0850 (street) · Grid FM19kb · CQ 5 · ITU 8 · map ↗
1.K3DU ✓ granted
2.W3NU held
 Granted
got K3DU
Filed May 12, 2020
Granted Jun 20, 2020
0009075858
 W3VKD · Victor K Dubitsky · Amateur Extra
4219 Landgreen street, Rockville, MD 20853
39.0829, -77.0850 (street) · Grid FM19kb · CQ 5 · ITU 8 · map ↗
1.K3DU ✓ granted
2.W3DU held
 Dismissed
got K3DU
Filed Nov 15, 2010
Granted Dec 3, 2010
0004459333
 KB3TTO · Victor K Dubitskiy · Amateur Extra
16 Nicholson Dr, Pasadena, MD 21122
39.1143, -76.4874 (ZIP center) · Grid FM19sc · CQ 5 · ITU 8 · map ↗
1.W3VKD ✓ granted
3.K3VKD available
 Granted
got W3VKD

Others requesting K3DU

10 applications listed K3DU as a choice, newest first.

FiledAwardApplicantChoice #Status
Jun 22, 2020 Jul 10, 2020 KF4BQO · BILLY W PERSONS · Columbiana, AL 6Dismissed
Jun 11, 2020 Jun 29, 2020 KC3HFW · Thomas E Abraham · Milton, PA 3Granted
Jun 2, 2020 Jun 20, 2020 W3VKD · Victor K Dubitsky · Rockville, MD 1Granted
May 29, 2020 Jun 16, 2020 WA3MWS · MICHAEL W FULLER · LEMOYNE, PA 4Granted
May 26, 2020 Jun 13, 2020 KB5SCD · Mark J Simon · Kingwood, TX 10Dismissed
May 26, 2020 Jun 13, 2020 AD2AK · RYAN TIMMONS · HOBOKEN, NJ 7Granted
May 22, 2020 Jun 9, 2020 WJ8O · Sardar Azari · Vienna, VA 1Dismissed
May 22, 2020 Jun 9, 2020 AG7KI · James B Speedy · Lynnwood, WA 3Dismissed
May 12, 2020 May 30, 2020 W3VKD · Victor K Dubitsky · Rockville, MD 1Dismissed
Apr 28, 2020 May 16, 2020 NM6M · CHRISTOPHER D WEBER · Glen Burnie, MD 14Granted

Repeaters within 50 miles

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

● repeater · ● 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)
MilesCallOutputOffsetToneModeNetworksLocation
3.4 W3KIT 438.2875 simplex TONE 203.5 FM (analog) AllStar 547612 AllStar 547619 SHARI-UHF Maryland, MD
3.6 KV3B 146.9550 -0.6 none FM (analog) Rockville, MD
3.7 W3MFP 442.8875 +5 CC5 DMR BrandMeister 312428101 Wheaton, MD
3.8 N3JFW 442.4875 +5 CC1 DMR K4USD-Net rockville, MD
4.2 N3BBF 442.9000 +5 CC1 DMR BrandMeister 314963 Potomac, MD
4.3 K3VOA 147.0450 +0.6 TONE 77.0 FM (analog) AllStar 23918 Silver Spring, MD
4.3 K3VOA 447.5750 -5 TONE 77.0 FM (analog) AllStar 23919 Silver Spring, MD
4.4 NC3M 445.9750 simplex TONE 100.0 FM (analog) AllStar 47835 Rockville, MD
4.5 KV3B 442.7500 +5 TSQL 156.7 FM (analog) Rockville, MD
5.0 K3UCB 442.9000 +5 CC1 DMR Interstate-Network Olney, MD
7.4 KA3LAO 441.8875 +5 CC1 DMR Interstate-Network Gaithersburg, MD
7.6 N3BBF 447.8750 -5 CC1 DMR BrandMeister 314982 Potomac, MD
7.9 KY3O 438.4500 -5 CC1 DMR BrandMeister 318573701 Calverton, MD
8.5 W3WDC 443.0125 +5 CC4 DMR BrandMeister 312819502 Washington, DC
9.2 WA3KOK 449.9750 -5 TSQL 107.2 FM (analog) IRLP 4000 Washington, DC
11.5 KV3B 53.2700 -0.6 TSQL 156.7 FM (analog) Germantown, MD
11.5 KV3B 444.2000 +5 none D-STAR Germantown, MD
11.8 W3GMR 146.8800 -0.6 TSQL 77.0 FM (analog) Greenbelt, MD
12.0 W3SQN 442.9000 +5 CC1 DMR BrandMeister 312418 Laurel, MD
12.8 W4WVP 145.4700 -0.6 TSQL 107.2 FM (analog) Arlington, VA
12.9 W3AGB 444.1625 +5 CC1 DMR DMRVA Washington, DC
12.9 W3AGB 147.3600 +0.6 CC1 DMR K4USD Washington, DC
12.9 W3AGB 1283.1000 -12 none D-STAR Washington, DC
12.9 K4HTA 146.6850 -0.6 TONE 110.9 FM (analog) AllStar 52093 EchoLink 🗓 1 net Tysons Corner, VA
13.1 K3GMR 146.6100 -0.6 TSQL 77.0 FM (analog) Bladensburg, MD
13.2 WA3KOK 446.5000 simplex TSQL 100.0 FM (analog) IRLP 4332 Laurel, MD
13.7 K3WS 443.3750 -5 TONE 123.0 FM (analog) AllStar 27701 Washington, DC
13.7 K3WS 447.3750 -5 TONE 123.0 FM (analog) AllStar 27701 Washington, DC
14.0 WA3RF 441.0000 +5 TONE 173.8 FM (analog) AllStar 57512 Cheverly, MD
14.3 KG1JAG 446.5000 -5 CC1 DMR BrandMeister 321925001 Town, L0C4T0R, MD
14.3 KB3LYL 442.2125 +5 CC1 DMR K4USD-Net Damascus, MD
14.5 KN4EAR 430.8000 in 445.8000 CC1 DMR BrandMeister 3100457 Reston, VA
15.2 K3HP 145.2500 -0.6 TONE 146.2 FM (analog) AllStar 29523 Damascus, MD
15.2 KB3HGW 448.8000 -5 CC1 DMR BrandMeister 321114701 Jessup, MD
15.3 N8HM 438.4500 -5 CC1 DMR BrandMeister 311101701 Arlington, VA
15.4 W9DSG 448.0625 -5 CC1 DMR BrandMeister 3223922 Falls Church, VA
15.8 N3QEM 442.9000 +5 CC1 DMR Interstate AWSVirginia Vienna, VA
15.8 N3QEM 145.1763 -0.6 CC13 DMR Interstate Vienna, VA
15.8 N3QEM 927.6750 -25 CC1 DMR Interstate Vienna, VA
15.9 N9KET 445.8000 -5 CC1 DMR BrandMeister 316759602 BrandMeister 316759603 BrandMeister 316759605 BrandMeister 316759606 BrandMeister 316759608 BrandMeister 316759611 BrandMeister 316759612 BrandMeister 316759614 BrandMeister 316759615 BrandMeister 316759617 BrandMeister 316759618 BrandMeister 316759620 BrandMeister 316759623 Vienna, VA
15.9 N4FSC 145.3100 -0.6 TSQL 77.0 FM (analog) Ashburn, VA
16.7 K0BMM 447.3125 -5 CC1 DMR BrandMeister 322315305 Arlington, VA
16.8 K3CUJ 147.3900 +0.6 TSQL 156.7 FM (analog) (FM,C4FM) Cooksville, MD
17.0 WA3DZD 146.7600 -0.6 TSQL 107.2 FM (analog) Jessup, MD
17.2 KA3LAO 442.7125 +5 CC1 DMR Interstate-2-Network Jessup, MD
17.5 K4SVT 441.9000 +5 CC1 DMR BrandMeister 311287801 Forest, VA
18.0 N4CV 443.0875 +5 CC1 DMR AWSVirginia Herndon, VA
18.0 N3OCQ 447.3500 -5 CC1 DMR BrandMeister 314789 🗓 1 net Herndon, VA
18.0 N3QEM 442.4375 +5 CC1 DMR Interstate Herndon, VA
18.0 N3QEM 927.6625 -25 CC1 DMR Interstate Herndon, VA
18.0 N3QEM 145.1637 -0.6 CC13 DMR Interstate Herndon, VA
18.0 N3QEM 442.8750 +5 CC1 DMR AWSVirginia Sterling, VA
18.2 W4HFH 442.4125 +5 CC1 DMR DMRVA Alexandria, VA
18.2 W4HFH 145.3800 -0.6 none D-STAR Alexandria, VA
18.2 W4HFH 1284.6000 -12 none D-STAR Alexandria, VA
18.6 W4HFH 147.3150 +0.6 TSQL 107.2 FM (analog) Alexandria, VA
18.6 W4HFH 442.0600 +5 none D-STAR Alexandria, VA
18.6 W4HFH 444.6000 +5 TSQL 107.2 FM (analog) Alexandria, VA
19.1 K4US 146.6550 -0.6 TSQL 141.3 FM (analog) (FM,C4FM) Alexandria, VA
19.3 N3JLT 443.1000 +5 CC1 DMR Interstate Alexandria, VA
20.0 KC3OQK 439.0000 -5 CC1 DMR BrandMeister 3159601 Ellicott City, MD
20.0 KC3OQK 449.0000 -5 CC1 DMR BrandMeister 315960101 Ellicott City, MD
20.2 N6PPP 445.0000 -5 CC1 DMR BrandMeister 3110809 Town, L0C4T0R, MD
20.5 K3PZN 147.2850 +0.6 TSQL 107.2 FM (analog) 🗓 1 net Sykesville, MD
21.0 K4XY 448.3750 -5 none FM (analog) AllStar 59777 Fair Oaks, VA
21.0 KB3IAI 439.9000 in 438.2000 CC1 DMR BrandMeister 3172111 Gambrills, MD
21.1 WB6EFW 442.1375 +5 CC1 DMR BrandMeister 315107 Ashburn, VA
21.1 KO4NCX 447.6750 -5 none D-STAR (DMR,DV) BrandMeister 312899 Ashburn, VA
22.1 K4IAD 147.3300 +0.6 TSQL 203.5 FM (analog) Dulles, VA
22.4 N3SCP 447.5500 -5 DG-ID 00-00 Fusion (C4FM) WIRES-X 18557 Gambrills, MD
22.5 WB6EFW 434.0000 +5 CC1 DMR BrandMeister 315103901 Ashburn, VA
23.2 KN4ANG 448.3000 simplex TSQL 110.9 FM (analog) IRLP 4048 Burke, VA
23.4 KD4RTH 443.1500 +5 CC1 DMR BrandMeister 310763 Chantilly, VA
23.4 N3OCQ 443.3500 +5 CC1 DMR BrandMeister 314601 🗓 1 net Chantilly, VA
23.5 KA2JAI 146.8050 -0.6 TSQL 107.2 FM (analog) EchoLink 🗓 1 net Millersville, MD
25.5 N3EV 145.1700 -0.6 CC1 DMR BrandMeister 311789 Leesburg, VA
25.5 N3EV 442.9000 +5 CC1 DMR BrandMeister 311790 Leesburg, VA
25.5 N3EV 447.8750 -5 CC1 DMR BrandMeister 311791 Leesburg, VA
25.5 N3EV 447.8250 -5 CC1 DMR BrandMeister 311792 Leesburg, VA
25.5 N3EV 447.7250 -5 CC1 DMR BrandMeister 311793 Leesburg, VA
25.5 WR3D 443.9000 +5 CC1 DMR OpenDMR Leesburg, VA
25.6 N3LHD 444.6500 +5 CC6 DMR Interstate-c-Bridge-1 Upper Marlboro, MD
26.0 W3VPR 147.0750 +0.6 TSQL 107.2 FM (analog) 🗓 3 nets Crownsville, MD
26.2 W3CPO 448.5000 -5 CC1 DMR BrandMeister 312442201 Glen Burnie, MD
26.9 W3VPR 444.4000 +5 TSQL 107.2 FM (analog) 🗓 3 nets Davidsonville, MD
26.9 W3VPR 147.1050 +0.6 TSQL 107.2 FM (analog) 🗓 3 nets Davidsonville, MD
27.5 W3SMR 147.1500 +0.6 TSQL 114.8 FM (analog) Brandywine, VA
27.6 N3EJT 147.1950 +0.6 CC1 DMR Not-Linked Owings Mills, MD
27.6 N3CDY 449.0750 -5 CC1 DMR Interstate Owings Mills, MD
27.9 KD3CXK 439.0650 -1 CC1 DMR BrandMeister 3223379 Brooklyn, MD
28.9 KB3CMA 442.3000 +5 TSQL 107.2 FM (analog) (FM,C4FM) Annapolis, MD
28.9 KK4QGD 425.5000 +5 CC1 DMR BrandMeister 313135 Manassas Park, VA
29.5 N3CDY 927.0625 -25 CC1 DMR Interstate Baltimore, MD
29.7 N3LHD 442.4625 +5 CC1 DMR Interstate-c-Bridge-1 Brandywine, MD
29.7 KB3CMA 441.8375 +5 CC1 DMR Interstate-3 Annapolis, MD
29.7 KR3LC 433.4500 in 446.4500 CC1 DMR BrandMeister 312414103 Pasadena, MD
30.0 W3FDK 146.7300 -0.6 TONE 141.3 FM (analog) 🗓 1 net Frederick, MD
30.0 W3FDK 145.1700 -0.6 none D-STAR 🗓 1 net Frederick, MD
30.0 W3FDK 444.8000 +5 none D-STAR 🗓 1 net Frederick, MD
30.7 W4OVH
Listed as W4OVH/R
 224.6600 -1.6 TONE 100.0 FM (analog) AllStar 47551 Manassas, VA
30.8 NQ4T 223.4000 simplex TONE 100.0 FM (analog) AllStar 594081 Manassas, VA
30.8 NQ4T 439.8000 simplex TONE 100.0 FM (analog) AllStar 59408 AllStar 594080 Manassas, VA
31.1 KC3FCQ 442.8750 +5 CC1 DMR BrandMeister 312411801 Arnold, MD
31.6 W4OVH 146.8650 -0.6 none D-STAR Manassas, VA
31.6 W4OVH 442.5125 +5 none D-STAR Manassas, VA
31.9 WD4HRO 1293.0000 -20 none D-STAR Woodbridge, VA
32.0 W4ATN 443.7875 +5 CC3 DMR DMR-MARC Annapolis, MD
33.0 W4BRM
Listed as W4BRM/R
 448.2250 -5 TONE 77.0 FM (analog) AllStar 27021 Haymarket, VA
33.0 K3OCM 443.8500 +5 CC6 DMR K4USD-Net Towson, MD
33.0 WR3IRS 441.4000 +5 CC1 DMR Interstate Towson, MD
33.0 W3DHS 145.1400 -0.6 none D-STAR Towson, MD
33.0 W3DHS 442.1125 +5 none D-STAR Towson, MD
33.9 W3FT 146.6700 -0.6 TSQL 107.2 FM (analog) Towson, MD
34.3 KC3SNV 438.0125 -5 CC1 DMR BrandMeister 318357102 Frederick, MD
34.6 K3PZN 449.8750 -5 TSQL 127.3 FM (analog) (FM,C4FM) 🗓 1 net Westminster, MD
34.6 K3PZN 145.4100 -0.6 TSQL 114.8 FM (analog) 🗓 1 net Westminster, MD
35.0 N4USI 145.4500 -0.6 none D-STAR Haymarket, VA
35.1 N3HAZ 439.5500 in 433.5500 CC1 DMR BrandMeister 3197367 Annapolis, MD
35.7 N3SBP 223.8000 -1.6 CC1 DMR BrandMeister 312410402 BrandMeister 314562 Parkville, MD
36.0 K3DO 441.9625 +5 CC1 DMR BrandMeister 312413 Frederick, MD
36.0 K3DO 447.8750 -5 CC1 DMR BrandMeister 312413 Frederick, MD
37.0 KJ4NXG 147.4200 simplex TONE 100.0 FM (analog) AllStar 50459 Round Hill, VA
38.7 WB3FFV 438.0150 -5 CC1 DMR BrandMeister 322199401 Middle River, MD FM1, MD
39.2 W4IY 147.2400 +0.6 TSQL 107.2 FM (analog) EchoLink Woodbridge, VA
39.3 K3LPV 449.9000 -5 CC1 DMR BrandMeister 310588 Essex, MD
39.3 K3LPV 449.2000 simplex CC? DMR Essex, MD
39.4 W3DAK 447.3750 -5 CC1 DMR BrandMeister 312299 Middle River, MD
39.4 N3EMC 927.7000 -25 CC2 DMR TGIF AllStar 67341 Middle River, MD
39.4 WG3K 444.3500 +5 none D-STAR (DMR,DV) BrandMeister 312393 Chesapeake Beach, MD
40.0 KD3SU 442.9500 +5 TONE 94.8 FM (analog) AllStar 27299 Boonsboro, MD
40.0 KD3SU 146.7750 -0.6 TONE 114.8 FM (analog) AllStar 27299 Boonsboro, MD
40.2 N3JLT 449.9250 -5 CC1 DMR Interstate-2-Network Bluemont, VA
42.5 K8GP
Listed as K8GP/R
 443.6500 +5 TONE 77.0 FM (analog) AllStar 28185 Bluemont, VA
42.7 W3GAB 433.8000 +5 CC1 DMR BrandMeister 321788101 Stevensville, MD
43.0 W3VLG 440.8000 +5 DG-ID 00-00 Fusion (C4FM) WIRES-X 52840 Charles Town, WV
43.0 W3VLG 145.4800 -0.6 DG-ID 00-00 Fusion (C4FM) WIRES-X 33277 Charles Town, WV
43.1 WA4TSC 147.3000 +0.6 TONE 146.2 FM (analog) 🗓 1 net Mt. Weather, VA
44.5 KR4IXC 433.3350 +1 CC1 DMR BrandMeister 3221890 Warrenton, VA
44.8 N3KZS 146.8950 -0.6 TSQL 107.2 FM (analog) IRLP 7070 Manchester, MD
45.5 K3OCM 443.1875 +5 CC6 DMR K4USD-Net Charlotte Hall, MD
45.9 N3PPH 441.3875 +5 CC1 DMR Interstate-3 Prince Frederick, MD
46.5 N3CNJ 145.2700 -0.6 CC1 DMR TGIF BM-S2 Fallston, MD
46.8 KR4KMS 449.5000 -5 CC7 DMR BrandMeister 322289401 Stafford, VA
47.8 KQ4TNV 446.4125 -5 CC1 DMR BrandMeister 314452 Staford, VA
48.8 N3PPH 441.7875 +5 CC1 DMR Interstate-2 Mechanicsville, MD
48.8 W4AVA 146.6250 -0.6 TSQL 107.2 FM (analog) Stafford, VA
49.2 K4VSS 438.4500 -5 CC1 DMR BrandMeister 322675501 Rising Sun, PA
49.3 N3VSI 442.9000 +5 TONE 127.3 FM (analog) AllStar 28094 AllStar 497352 Larry - Edgewood, MD
49.8 WN3S 439.0000 -5 CC1 DMR BrandMeister 3197267 Bel Air, MD
5.8 N3HF offline 443.4500 +5 TSQL 156.7 FM (analog) IRLP 4712 Silver Spring, MD
11.4 WA3KOK offline 144.4400 simplex none FM (analog) IRLP 4173 Laurel, MD
11.4 WA3KOK offline 144.9700 simplex TSQL 107.2 FM (analog) IRLP 4542 Clarksville, MD
11.9 N3TUK offline 443.6625 +5 CC1 DMR BrandMeister 313057 Hyattsville, MD
13.9 W3LRC offline 447.8500 -5 CC1 DMR BrandMeister 314342 Jessup, MD
20.3 N3QEM offline 442.9125 -5 CC? DMR Fairfax, VA
24.5 KP4IP offline 442.4000 +5 CC1 DMR BrandMeister 310148 Millersville, MD
31.8 K3BAY offline 145.5400 simplex TSQL 107.2 FM (analog) IRLP 4717 Pasadena, MD
32.5 N2MCS offline 442.9000 +5 CC? DMR Baltimore, MD
33.0 W4BRM offline 448.3250 -5 CC6 DMR BrandMeister 315148 Haymarket, VA
39.9 KD3SU offline 146.5350 simplex TSQL 88.5 FM (analog) IRLP 8841 Boonsboro, MD
39.9 W3DAK offline 145.1700 -0.6 CC1 DMR BrandMeister 312377 Middle River, MD
40.0 KD3SU offline 147.4400 simplex TSQL 79.7 FM (analog) IRLP 8562 Boonsboro, MD
46.2 W7DQ offline 446.9250 simplex TSQL 107.2 FM (analog) IRLP 3510 Widewater, VA
49.3 N3VSI offline 146.5600 simplex TSQL 127.3 FM (analog) IRLP 8277 AllStar 29916 Edgewood, MD