Is your domain blocked in Czechia? Check it per ISP

ISPs answer “no such domain” · Ministry of Finance

The resolver reports that the domain does not exist. The browser shows a generic “site can’t be reached”, which is why this kind of block is usually mistaken for a hosting problem.

Czech rules forbid IP blocking and make the warning page optional, so the usual outcome is a plain “no such domain”. That is the hardest kind of block to tell apart from a DNS misconfiguration — unless you ask the provider’s resolver directly.

What we check in Czechia

For every provider below we ask that provider’s own DNS resolver, from inside its network, what your domain resolves to — and compare the answer with public DNS. That is the same answer a subscriber gets, which is why a datacenter-based “is it down?” tool cannot see these blocks at all.

The official list

Ministry of Finance publishes the register at https://www.mfcr.cz/. Domains are added continuously, and nobody tells you when yours is added.

How to check your own domain

ASNWatch runs this check for you every half hour across 3 Czechia providers and tells you which one stopped resolving your domain, usually before the traffic drop shows up in your tracker. The free plan covers three domains.

Check my domain in Czechia

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