We check a site against Roskomnadzor's block registry, a community list of throttled/unreachable services, and live reachability — from our server and from your own connection.
RKN registry: 1775944 domains, updated 03.11.2026 14:41 UTC · community list: 486, 03.11.2026 14:41 UTC. Source: antifilter.download (registry mirror).
“In the RKN registry” — the domain (or its parent) is in the official registry; Russian ISPs must restrict it. “Restricted (community)” — de facto throttled/unreachable from Russia, or the service itself blocks Russian users. “Not listed” — no official block; if it still fails, check the outage page.