There are a bunch of good tools to use when you want to check if a website is blocked in your country, like CheckSite.us, Blockedinchina.net, Downornot.net, Host-tracker.com, Blocked.org.uk, UpDown.co, Isup.me and Upordown.net.
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To check information about your website domain, go to tab Diagnostics in Facebook Events Manager. Then, follow the instructions to see if any domains are blocked and how to fix it.
Facebook Block Feature
When you block someone, all connections that once existed between you, including friendship pages, notes, comments and likes, will be lost. You no longer have access to their profile and they can no longer access yours.
Click your Page photo at the top right of Facebook, click Settings & privacy, then click Settings. In the left menu, click Privacy, then click Blocking. Select the profiles, apps and Pages you want to block: Block users: Type the name of the profile you want to block, then click Block.
If you are unable to access some websites on your device, your device administrator or internet service provider has likely blocked them. If websites are not blocked but still refuse to open, it could be due to IP address blockage, misconfigured proxy settings, delayed DNS response, or some browser-specific problem.
Why do websites get blocked? Websites get blocked when they detect an IP address that isn't supposed to access the restricted content. Your IP (Internet Protocol) address identifies your device on the internet and reveals your physical location. That's what lets websites find your IP and block (or allow) your device.
As a Chrome Enterprise admin you can block and allow URLs so that users can only visit certain websites. Restricting users' internet access can increase productivity and protect your organization from viruses and malicious content found on some websites.
A block page is displayed in a user's browser when your software prevents access to a URL. The block page has 3 sections: The header explains that the site has been blocked. The top frame contains the actual block message, including the requested URL and the reason it was blocked.
If a network server blocks your IP address, your device won't be able to access a particular website. The blockage is temporary, and it can last up to 24 hours.
Select the Lock icon in the bottom left, and enter your password. Choose your user account from the left pane. Select Allow unrestricted access to websites and save your changes.
You can block a page on Facebook so that the page can't interact with your posts or reply to comments. Blocking a page will also automatically unlike and unfollow it, if applicable. You can unblock a page using either the desktop or mobile version of the site.
People who manage your Page have acted against our Community Standards: Facebook is a place where people connect with each other using their authentic identities. Profiles that don't follow our Community Standards or go against our Terms of Service may be removed from Facebook.
The length of a temporary block by Facebook depends on the severity of the violation and the user's history on Facebook. It has been observed that a temporary block may last as little as a few hours, but could also last up to 30 days. There is currently no way to view the duration of the block.
Blocking someone means they can't see your timeline, message you, tag you, and send you friend requests. You won't see their activity either.
Can a blocked person see my business page on Facebook? When you block someone they can see your business page and share your posts, but they can't interact in any way. A blocked person can't like or comment, or send messages to the page's inbox.
Tap in the top right of Facebook. Scroll down and tap Settings. Scroll down to Audience and Visibility and tap Blocking. Tap Unblock next to the profile you want to unblock.