FCC / Callsign Lookup
🔎 Live Callsign Lookup
Search US amateur radio license data by callsign.
Search License🏛️ Official FCC / ARRL Search
Use these if you want the full official records or name / ZIP search.
Open FCC ULS Open ARRL SearchRF Calculators
Dipole Antenna
Quarter Wave Vertical
Wavelength
Watts to dBm
SWR Reflection
Callsign Phonetic
Grid / Distance Helper
Maidenhead Grid Distance
Simple QSO Script
Operator Tools
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⚡ ERP / EIRP Calculator
📻 Repeater Offset Helper
🎛️ Contest Exchange Builder
⏱️ UTC Scheduler
🔊 Morse Code Practice
Play Morse🌎 DX Direction Notes
💾 Export Logbook
Download your browser logbook as CSV.
Export CSVVisual Band Plan Reference
80m — 3.5 to 4.0 MHz
Good for regional/nighttime HF contacts.
40m — 7.0 to 7.3 MHz
Reliable daytime regional and nighttime DX band.
20m — 14.0 to 14.35 MHz
Main DX band during daylight and openings.
10m — 28.0 to 29.7 MHz
Excellent worldwide DX when solar conditions are strong.
Learning Center
🗣️ Phonetic Alphabet
Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliet, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu.
🧭 Q-Codes
QTH: Location
QSO: Contact
QSL: Confirm reception
QRZ: Who is calling me?
QRM: Interference
QRN: Static noise
📶 Signal Reports
RST: Readability, Strength, Tone.
59: strong and clear voice signal.
599: strong CW/digital report.
📻 Popular Modes
SSB: HF voice
CW: Morse
FT8: weak signal digital
FM: repeaters/local
AM: vintage/experimental
🚨 Emergency Basics
Mayday: life-threatening emergency.
Pan-Pan: urgent situation.
Break: priority interruption.
✅ Before Calling CQ
Listen first. Ask if the frequency is in use. Identify clearly. Keep transmissions respectful and concise.
Local Logbook
Useful External References
☀️ NOAA Space Weather
Solar and geomagnetic conditions.
Open NOAA →📡 VOACAP
HF propagation prediction.
Open VOACAP →🌎 DX Summit
DX cluster spots.
Open DX Summit →📊 PSKReporter
Digital signal reports worldwide.
Open PSKReporter →🛰️ AMSAT
Amateur satellite resources.
Open AMSAT →🎧 KiwiSDR Map
Online SDR receivers.
Open KiwiSDR →🌲 POTA
Parks on the Air.
Open POTA →⛰️ SOTA
Summits on the Air.
Open SOTA →