Network block checker

Is your site reachable from other countries?

DNS tampering, IP blocking or TLS-SNI (DPI) reset — we check your site from networks around the world and show whether it's reachable and how access is restricted.

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World Russia · TSPUTSPU — 'technical measures to counter threats': deep packet inspection (DPI) equipment at Russian ISPs under the 'sovereign internet' law, used to block and throttle traffic. The 'Russia' check tests reachability from networks behind TSPU.

What we check

01 · DNS

DNS spoofed or empty

The ISP resolver returned a wrong IP or nothing — DNS spoofing.

02 · IP

Address unreachable

Packets don’t reach the address (but do locally) — IP block or DPI.

03 · TLS-SNI

Handshake reset by SNI

Ping works but TLS to your domain breaks — SNI filtering on DPI.

Is your site reachable from other countries?

DNS spoofed or empty

Address unreachable

Handshake reset by SNI

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