Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station KD9YFN-1 - show graphs
Location: 43°10.69' N 87°58.52' W - locator EN63AE22XS - show map
4.2 km West bearing 276° from River Hills, Milwaukee County, Wisconsin, United States [?]
6.1 km West bearing 268° from Bayside, Milwaukee County, Wisconsin, United States
16.5 km North bearing 340° from Milwaukee, Milwaukee County, Wisconsin, United States
136.0 km Northeast bearing 42° from Rockford, Winnebago County, Illinois, United States
Last position: 2025-04-03 08:39:15 UTC (37d 6h31m ago)
2025-04-03 03:39:15 CDT local time at River Hills, United States [?]
Altitude: 189 m
Course: 299°
Speed: 4 km/h
Device: Open Source: APRSdroid (app, Android)
Last path: KD9YFN-1>APDR16 via TCPIP*,qAC,T2CSNGRAD
Positions stored: 1685
Other SSIDs: KD9YFN-10
About this site
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.
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