APRS – Track Callsigns with Google Maps and more…

This link will display the APRS stations in the area. You can also track callsigns and set other options. Automatic Position Reporting System

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).

Source: Amateur Radio Positioning System