Block Checker: Is Site Blocked

Block Checker — find out in seconds whether a website is blocked, which registry restricts it, and how DNS servers around the world respond to the domain.

A website will not load and you do not know why? It could be government censorship, an ISP-level restriction, a DNS failure, or an outage on the site itself. Block Checker gives you a clear answer instead of guesswork.

What you get:

• Blocked sites catalog — browse up-to-date registries of restricted domains, with instant search and content-type filters.

• DNS checker — query five public DNS providers (Google, Cloudflare, Quad9, NextDNS, AdGuard) over encrypted DNS over HTTPS and compare blocking status, resolved IP addresses, and response time for each server.

• Domain lookup — enter any domain or URL and instantly see its current accessibility status.

• Censorship statistics — the total number of restricted domains, a breakdown by category and registry, and the date of the latest database sync.

• Clean, modern interface — fast, lightweight, and with full dark mode support.

Who is it for:

• webmasters and site owners monitoring the availability of their projects;
• network administrators and IT professionals diagnosing DNS issues;
• journalists and researchers tracking internet censorship trends;
• everyday users who simply want to know why a site is down.

Please note: Block Checker is an information tool. It is not a VPN, it does not unblock websites, and it does not change your device settings. It only shows publicly available data about domain status.

Stop guessing whether a site is down for everyone or just for you. Run a website block test, check a domain against restriction registries, use the built-in DNS lookup, and follow internet censorship trends — all in one free app.

Questions or feedback? Reach us from the Settings screen inside the app — we read every message.