How to Check if a Website Is Blocked in Russia (RKN)

Short answer. An RKN block shows up like this: the site is unreachable from Russian networks but opens from abroad. The most reliable way to confirm it is to compare availability from Russia against another country. If you get a timeout or connection reset from Russia while the EU/US loads the site fine, that strongly indicates a block rather than a general server failure.

How a block manifests

A block differs from an ordinary outage by characteristic signs:

• Connection timeout or reset (RST) on port 443/80 from Russian networks;
• the site opens from abroad but not from Russia;
• sometimes a provider stub page replaces the real content;
• the problem is independent of your hosting — the server is alive.

Key diagnostic move: if it is unreachable from Russia but works from the EU or US, that points to network filtering, not a server failure.

Step 1. Check availability from Russia

First confirm the problem reproduces specifically from Russian networks. On enterno.io this is a multi-region check using the ru-msk (Moscow) node. Open the main HTTP checker and test the URL.

Step 2. Compare with a check from abroad

Now check the same URL from the EU (eu-de) and the US (us-east). enterno.io supports three check regions:

1. ru-msk — Russia;
2. eu-de — Germany;
3. us-east — United States.

The free plan includes the Russia (ru-msk) check only. For continuous "Russia vs abroad" comparison in monitoring you need a paid plan with multi-region.

Result	From Russia (ru-msk)	From abroad (eu/us)	Conclusion
Scenario A	Timeout / RST	200 OK	Looks like a block
Scenario B	Timeout	Timeout	Server failure, not a block
Scenario C	200 OK	200 OK	Reachable everywhere
Scenario D	Provider stub page	200 OK	Clear block

Step 3. Check manually with curl

From a Russian server or VPS you can probe reachability directly:

# check status code and time
curl -o /dev/null -s -w "code=%{http_code} time=%{time_total}s\n" \
  --connect-timeout 10 https://example.com/

# check TCP reachability of port 443
curl -v --connect-timeout 10 https://example.com/ 2>&1 | head -n 20

If the connection fails from Russia but succeeds from a foreign server, that is consistent with a block.

Step 4. Check DNS

Filtering sometimes targets DNS. Compare the IPs your resolver returns. Check records on the DNS checker page or with dig:

dig +short example.com A
dig +short @8.8.8.8 example.com A

Step 5. Set up continuous monitoring from Russia

A one-off check captures a moment, but blocks can come and go. Set up continuous monitoring from Russia on the monitors page: enterno.io checks availability on a schedule (from 5 minutes on Free) and sends a Telegram alert the moment the site becomes unreachable from Russia.

Continuous ru-msk monitoring turns "I think we got blocked" into a precise timestamp: you know exactly when availability dropped.

FAQ

How do I tell a block from a server outage?

Compare availability from Russia and abroad. A server outage is unreachable everywhere. A block is unreachable from Russia but reachable from the EU/US.

Can I check for a block for free?

Yes, a basic check from Russia (ru-msk) is available on enterno.io's free plan. Comparing against foreign regions in monitoring requires a paid plan.

Why does the site open for me but is "blocked" for others?

Providers apply filtering differently, and DNS cache or VPNs can interfere. Check from a clean Russian network without a VPN.

Does multi-region monitoring help?

Yes — it shows availability from Russia, the EU and the US at once, and the divergence between regions is the main filtering indicator.

Check whether your site is reachable from Russia right now: use the HTTP checker on enterno.io, and for ongoing control set up monitoring from ru-msk with Telegram alerts. Related tools: DNS checker and SSL checker.