TRANSPARENCY

YSF Live international status monitoring

YSF Live is a U.S.-operated amateur-radio community project. For eligible public YSF reflector listings that have not been excluded, the service may send a low-rate four-byte UDP status request (YSFS) to measure connected-endpoint occupancy. This is automatic sampling with an exclusion option, not owner opt-in. It does not record voice activity or decode station callsigns.

Who operates it?

Project: YSF Live. Controller: Matt Scheiderer (KF0WSS), United States. Monitoring source IPv4: 178.156.249.85. Monitoring hostname: monitor.ysflive.com. Matching DNS and reverse DNS are checked before sampling is enabled.

How the probe works

The request has no callsign field. It does not send a login (YSFP) or unlink (YSFU) and does not leave a gateway connected. Some reflector servers may only log the source IP, while others log nothing. Unsupported systems are not assumed inactive.

What is kept?

The collector discards the raw response and exact connected count, retaining only a dated category for 30 UTC date buckets, including unpublished dates: five or more connected endpoints, below that publication threshold, or unknown. Only repeated qualifying dates are shown, after one full additional UTC day has ended. No raw packets, audio, decoded station callsigns, individual transmission events, or timestamped per-reflector result logs are stored for international occupancy. Five endpoints do not prove five distinct people or legal anonymisation.

Frequency and exclusions

Sampling is capped at once per UTC day per eligible reflector and is disabled unless explicitly enabled by the operator. Existing reflector exclusions are honored. A reflector owner may request cessation of connections, correction, or removal.

Contact / opt out

Owners and affected individuals can contact [email protected] with the YSF reflector ID. The service will stop status checks and remove associated history from the active statistics database. The existing administrator outbound-traffic switch and a separate pause file also stop the collector.

For details, also see our privacy policy and reflector-owner information.