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 ZS4PR-12 - show graphs
Comment: 3.93V -109dBm -12.0dB SF10 LoRaWAN Tracker eynet-vaal-brkfnt
Location: 26°46.54' S 27°51.25' E - locator KG33WF23MU - show map
5.6 km Northeast bearing 41° from Sasolburg, Free State, South Africa [?]
7.3 km South bearing 167° from Vanderbijlpark, Gauteng, South Africa
56.4 km South bearing 180° from Soweto, Gauteng, South Africa
66.4 km South bearing 196° from Johannesburg, Gauteng, South Africa
Last position: 2026-02-22 08:35:59 UTC (2d 9h38m ago)
2026-02-22 10:35:59 SAST local time at Sasolburg, South Africa [?]
Altitude: 1456 m
Course:
Speed: 26 km/h
Device: Unknown: Experimental
Last path: ZS4PR-12>APZLRW via TCPIP*,qAS,ZS4PR
Positions stored: 331
Other SSIDs: ZS4PR-4 ZS4PR-3 ZS4PR ZS4PR-9 ZS4PR-1 ZS4PR-5 ZS4PR-15 ZS4PR-7 ZS4PR-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