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06:46 UTC

The World of Amateur Radio in One Shack

Tools

Tools

Free, no sign-in, nothing to install. Everything here runs in your browser.

Callsign Lookup

Name, license class, location and grid square for US and Canadian callsigns.

Open the full lookup page for shareable links like /lookup/?call=W1AW.

More Tools

Vanity Finder

Calls free now, calls coming free, and a check for the one you want.

Radio Horizon

How far a VHF/UHF signal can see over the curve of the Earth.

Antenna Length

Starting lengths for dipoles, verticals, end-feds and loops.

Grid Square & Distance

Find a grid square, and the distance and heading between two.

Coax Loss

How much power reaches the antenna, cable by cable.

Morse Trainer

Learn and practice copying code by ear, at your speed.

Privileges

Which bands, modes and power your license class may use.

Gray Line

Live world map of day, night and the twilight band, with your sunrise and sunset.