Free worldwide APRS-IS map. Track ham radio callsigns, find stations near you, send APRS messages from the web. Live feed in 11 languages, no login required.
APRS (Automatic Packet Reporting System) is a real-time digital communications protocol used by licensed amateur radio operators to share position, weather, telemetry and short messages over VHF/UHF and HF radio. Stations beacon their location every few minutes; that data is gateway'd into APRS-IS, the global Internet backbone, where any client — including this map — can render it live.
Type any amateur radio callsign in the search bar (e.g. W1ABC, DL1XYZ, JA1XYZ). The map flies to the station's last known position, shows hop trail to the gateway, and surfaces the recent beacon log, weather samples, and telemetry charts.
Every Thursday (UTC), hundreds of operators across 50+ countries check in to the HOTG net by sending CQ HOTG to ANSRVR. APRS World tracks the live leaderboard at /aprsthursday — country counts, top participants, archive of past Thursdays.
CQ HOTG
With a free account and an APRS-IS passcode, you can send messages directly from the browser to any APRS-capable station — no radio required. Use the in-app composer on /messages.
See the hardware guide for recommended APRS trackers (Yaesu FT5DR, Kenwood TM-D710, TinyTrak, Mobilinkd, AB1KW pico) and per-country frequency tables (144.39 MHz US, 144.800 MHz EU, 144.640 MHz JP).
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Free worldwide APRS map. Track ham radio callsigns, find stations near you, send APRS messages from the web. Live APRS-IS feed in 11 languages.
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