Listen to the world
with online SDRs

Thousands of public Software-Defined Radio receivers are online right now. This hub points you to the best directories, maps and a curated selection of reliable receivers.

Live Maps & Directories Featured Receivers

Listening only. Online SDRs let you receive signals. Transmitting on amateur, PMR, CB or any other band requires the appropriate licence or licence-exempt authorisation in your country. Do not use these receivers to monitor private communications where that is restricted by local law. Always follow the rules of the country you are in and the country of the receiver.

Start here — live directories

Receiverbook.de Large searchable list of KiwiSDR, OpenWebRX and WebSDR receivers worldwide. KiwiSDR Map (rx.linkfanel.net) Interactive world map of KiwiSDR receivers. Click a marker to open. rx-tx.info Table Searchable table of 2000+ SDR points with filters by country, band and type. WebSDR.org Official list of classic WebSDR servers (PA3FWM software). Skywave Linux Best SDRs Curated high-quality / high-SNR receivers, often pre-tuned. rx-tx.info Map Map view of the same large database.

The three main platforms

🥝 KiwiSDR

BeagleBone-based wideband HF receivers (roughly 10 kHz–30 MHz). Multiple users can tune independently. Excellent for shortwave, utility and amateur HF. Map: rx.linkfanel.net

More about KiwiSDR →

📡 WebSDR

The original multi-user web SDR software by PA3FWM. Many classic HF, VHF and UHF receivers. List at websdr.org. Famous example: University of Twente.

More about WebSDR →

🔊 OpenWebRX

Modern open-source web SDR supporting RTL-SDR, SDRPlay, Airspy and more. Covers HF through UHF and often digital modes. Listed on Receiverbook and rx-tx.info.

More about OpenWebRX →

Our sites

📻 BPFRG Full — pttradio.co.uk/BPFRG-full 📡 BPFRG Site — pttradio.co.uk/BPFRG-site

Quick tips

Choose a quiet location

Rural or coastal receivers usually have lower noise than city ones. Look at SNR figures on Kiwi maps when available.

Respect user limits

Many Kiwis limit concurrent users (often 2–8). If a receiver is full, try another nearby or come back later.

UK listeners

Useful for checking propagation, hearing the Sunday PMR446 net from another angle, airband, marine and HF utility. See the Featured Receivers page for UK options.

Listen to the worldwith online SDRs