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 OK4MD-31 - show graphs
Comment: DP_RSSI: -121 dBm DP_SNR: -18.50 dB
Mic-E message: En route
Last status: https://github.com/richonguzman/LoRa_APRS_Tracker 2025-08-11
Location: 50°06.91' N 14°25.09' E - locator JO70FC07EP - show map
3.0 km North bearing 356° from Prague, Hlavní Mesto Praha, Czech Republic [?]
5.0 km South bearing 163° from Roztoky, Středočeský Kraj, Czech Republic
6.3 km South bearing 202° from Zdiby, Středočeský Kraj, Czech Republic
114.5 km Southeast bearing 155° from Dresden, Direktionsbezirk Dresden, Saxony, Germany
Last position: 2026-01-31 16:27:18 UTC (5m10s ago)
2026-01-31 17:27:18 CET local time at Prague, Czech Republic [?]
Altitude: 224 m
Course: 79°
Speed: 13 km/h
Last telemetry: 2026-01-31 16:19:46 UTC (12m42s ago) – show telemetry
Voltage: 4.120 VDC
Last path: OK4MD-31>UP0V91 via WIDE1-1,qAO,OK0HCS-1 (good)
Positions stored: 2031
Other SSIDs: OK4MD-13 OK4MD-22 OK4MD-20 OK4MD-2 OK4MD-3 OK4MD-1 OK4MD-N OK4MD-14 OK4MD-12 OK4MD-15 OK4MD OK4MD-9 OK4MD-L OK4MD-6 OK4MD-32 OK4MD-7 OK4MD-8 OK4MD-5 OK4MD-21 OK4MD-11 OK4MD-D OK4MD-Y OK4MD-4
Stations which heard OK4MD-31 directly on radio –
callsign pkts first heard - UTC last heard longest (tx => rx) longest at - UTC

Only position packets which were originated by the station are shown here. The range statistics show some extra long hops, because some digipeaters do not correctly add themselves to the digipeater path. Please check the raw packets.
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