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What is aprs.fi?

This is a global APRS database, which archives position tracking, weather and message information collected from the APRS-IS network. Position data and routes traveled by APRS tracking stations are shown on an interactive map which can be zoomed and panned easily. New and updated data is shown on the map in real time without need to reload or refresh the page! Tracking data is stored in the database for six months.

You can also use this service to find your QTH/QRA locator (or your grid square) by simply pointing at a location on the map. Entering a QTH locator in the search box will move the map to the given location and show a rectangle containing the given locator. Short and extended locators are supported (from KP20 to KP20LE20TP).

About APRS:

This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.

aprs.fi in 20 languages!

Select your preferred language in your web browser's configuration. Available languages: cs da de el en es fi fr hr hu it ja nb nl pl pt ru sl sv tr

Blog!

Learn about new features and interesting tracking targets from the aprs.fi blog!

APRS is a registered trademark of APRS Software and Bob Bruninga, WB4APR.


User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS