N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 4, 2026) · next update today 8:30 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

K4VKS HAM

✅ Available for a vanity request — free since Dec 23, 2011.

1x3 call: Technician, General, Advanced and Amateur Extra licensees can request it. No pending applications list it.

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

Not currently held · 1 holder on record · available since Dec 23, 2011

Previous holder: Vishnu K Singh

Held K4VKS Mar 13, 2007 → Dec 22, 2009 · first licensed Feb 21, 2007 as KI4TRT · 4 licenses · FRN 0016131427

📦 Moved: Lawrenceville, GA → Coral Springs, FL

W4TF Active Amateur Extra · vanity Sep 7, 2016 → expires Sep 7, 2036

Licensee
Vishnu K Singh

Address
5645 Coral Ridge Dr Suite 432
Coral Springs, FL 33076
26.2998, -80.2787 (street) · Grid EL96uh · CQ 5 · ITU 8 · map ↗

FRN
0016131427

Previous call
AJ4VS (General)

Last granted
Sep 2, 2026

Effective
Sep 2, 2026

Last action
Sep 2, 2026
FCC actions (8)
- Sep 2, 2026 — License renewed LIREN
- Mar 5, 2026 — Administrative update LIAUA
- Jun 16, 2020 — Administrative update LIAUA
- Dec 13, 2018 — Administrative update LIAUA
- Nov 10, 2016 — Administrative update LIAUA
- Sep 13, 2016 — Administrative update LIAUA
- Sep 7, 2016 — Vanity call sign granted VANGRT
- Sep 7, 2016 — License issued LIISS
📦 Moved: Fort Lauderdale, FL → Lawrenceville, GA

AJ4VS Canceled Amateur Extra · vanity Dec 22, 2009 → Sep 7, 2016 (canceled)

Licensee
Vishnu K Singh

Address
755 Braves Ave #1407
Lawrenceville, GA 30043
34.0100, -84.0050 (ZIP center) · Grid EM74xa · CQ 5 · ITU 8 · map ↗

FRN
0016131427

Previous call
K4VKS (General)

Last granted
Dec 22, 2009

Effective
Jun 9, 2016

Last action
Sep 7, 2016
FCC actions (8)
- Sep 7, 2016 — License canceled LICAN
- Jun 9, 2016 — Administrative update LIAUA
- Sep 24, 2013 — Administrative update LIAUA
- Sep 13, 2013 — Administrative update LIAUA
- Mar 26, 2013 — Administrative update LIAUA
- Apr 8, 2010 — Administrative update LIAUA
- Dec 22, 2009 — Vanity call sign granted VANGRT
- Dec 22, 2009 — License issued LIISS
K4VKS Canceled Amateur Extra · vanity Mar 13, 2007 → Dec 22, 2009 (canceled)

Licensee
Vishnu K Singh

Address
PO Box 327522
Fort Lauderdale, FL 33332
26.0066, -80.4602 (ZIP center) · Grid EL96sa · CQ 5 · ITU 8 · map ↗

FRN
0016131427

Previous call
KI4TRT (General)

Last granted
Mar 13, 2007

Effective
Nov 18, 2009

Last action
Dec 22, 2009
FCC actions (5)
- Dec 22, 2009 — License canceled LICAN
- Nov 18, 2009 — License modified LIMOD
- Aug 28, 2009 — License modified LIMOD
- Mar 13, 2007 — Vanity call sign granted VANGRT
- Mar 13, 2007 — License issued LIISS
KI4TRT Canceled Technician Feb 21, 2007 → Mar 13, 2007 (canceled)

Licensee
Vishnu K Singh

Address
PO Box 327522
Fort Lauderdale, FL 33332
26.0066, -80.4602 (ZIP center) · Grid EL96sa · CQ 5 · ITU 8 · map ↗

FRN
0016131427

Last granted
Feb 21, 2007

Effective
Feb 22, 2007

Last action
Mar 13, 2007
FCC actions (4)
- Mar 13, 2007 — License canceled LICAN
- Feb 22, 2007 — Administrative update LIAUA
- Feb 21, 2007 — License issued LIISS
- Feb 21, 2007 — 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 27, 2026 → Oct 4, 2026 · 2 snapshots · as W4TF
Vishnu K Singh
5645 Coral Ridge Dr Suite 432, Coral Springs, FL 33076
26.2998, -80.2787 (street) · Grid EL96uh · CQ 5 · ITU 8 · map ↗
Seen Jun 30, 2016 → Oct 4, 2026 · 26 snapshots · as AJ4VS
Vishnu K Singh
755 Braves Ave #1407, Lawrenceville, GA 30043
34.0100, -84.0050 (ZIP center) · Grid EM74xa · CQ 5 · ITU 8 · map ↗
Seen May 27, 2010 → Oct 4, 2026 · 94 snapshots · as KI4TRT
Vishnu K Singh
PO Box 327522
Fort Lauderdale, FL 33332
26.0066, -80.4602 (ZIP center) · Grid EL96sa · CQ 5 · ITU 8 · map ↗
Seen Apr 16, 2022 → Sep 25, 2025 · 11 snapshots · as W4TF
Vishnu K Singh
10650 Moore Dr, Parkland, FL 33076
26.3193, -80.2718 (ZIP center) · Grid EL96uh · CQ 5 · ITU 8 · map ↗
Seen Jan 22, 2019 → May 6, 2019 · 2 snapshots · as W4TF
Vishnu K Singh
1722 Sheridan St, Ste #197, Hollywood, FL 33020
26.0192, -80.1529 (ZIP center) · Grid EL96wa · CQ 5 · ITU 8 · map ↗
Seen Apr 6, 2013 → Sep 3, 2018 · 11 snapshots · as W4TF
Vishnu K Singh
6110 SW 190 Ave, Southwest Ranches, FL 33332
26.0066, -80.4602 (ZIP center) · Grid EL96sa · CQ 5 · ITU 8 · map ↗
Seen Oct 22, 2013 → Nov 4, 2016 · 14 snapshots · as W4TF
Vishnu K Singh
10548 nw 36 st, coral springs, FL 33065
26.2745, -80.2604 (ZIP center) · Grid EL96ug · CQ 5 · ITU 8 · map ↗
Seen May 27, 2010 → Feb 18, 2013 · 6 snapshots · as AJ4VS
Vishnu K Singh
3354 SW Martin Street, Port Saint Lucie, FL 34953
27.2497, -80.3832 (ZIP center) · Grid EL97tf · CQ 5 · ITU 8 · map ↗

Others requesting K4VKS

2 applications listed K4VKS as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
May 30, 2023	Jun 17, 2023	KD4HJW · CHAD R WOMACK · Duncan, SC	5	Granted
Feb 21, 2007	Mar 11, 2007	KI4TRT · Vishnu K Singh · Fort Lauderdale, FL	1	Granted

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for K4VKS in the last 24 hours. They show up here within seconds of K4VKS beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.