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*
Web station KR4EJX - show graphs
Comment: TH-475a
Location: 38°44.00' N 77°34.00' W - locator FM18FR15XX - show map
3.0 km South bearing 166° from Linton Hall, Prince William County, Virginia, United States [?]
4.0 km North bearing 16° from Nokesville, Prince William County, Virginia, United States
49.3 km West bearing 249° from Washington, D. C., Washington, D.C., United States
103.1 km Southwest bearing 233° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2025-07-11 13:38:09 UTC (71d 8h52m ago)
2025-07-11 09:38:09 EDT local time at Linton Hall, United States [?]
Position ambiguous: Precision reduced at transmitter by 2 digits, position resolution approximately 1.9 km.
Speed: 0 km/h
Last path: KR4EJX>aprs.fi via aprsfi-iOS
Positions stored: 1680
Other SSIDs: KR4EJX-B
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