First, use a site availability checker to see whether the site is down for everyone or only for you. A site that is down for everyone needs checks on the host's status page, account suspension, domain expiry and error logs. When only you cannot reach it, flush your DNS cache and try mobile data. A ping that times out while mobile data works suggests the server firewall has blocked your IP address.
A website going offline can have several causes, from a temporary server issue to a DNS misconfiguration or a firewall block. Working through each possibility in order will help you identify the cause and get your site back online.
This guide covers the most common reasons a site becomes unreachable and the steps to diagnose each one.
Before making any changes, you need to know whether the problem is isolated to your connection or affecting all visitors. This tells you whether the issue is server-side or local to your network.

Once you know the scope of the problem, follow the relevant section below.
If the checker confirms your site is unreachable for all visitors, the issue is likely with the server or your site’s files and configuration. Work through the following checks in order.

If none of these steps reveal the cause, open a support ticket with the error code, your domain name and the time the issue started.
When a site is reachable for other visitors but not for you, the problem is between your device and the server. The most common causes are a firewall block, a DNS caching issue or a local network problem.

Once you have identified the cause, the relevant fix above should restore access. If the problem persists after working through all steps, contact support with the details gathered during your checks.
You worked through the most common reasons a website becomes unreachable, covering server status, domain expiry, error logs, DNS caching and firewall blocks. Identifying whether the outage is global or local is the key first step, as it determines which path to follow.
For related topics, see our guides on fixing website error codes, fixing too many redirects and editing your DNS zone. If your site is running WordPress, our guide on removing malware from WordPress covers cases where a site goes down due to a security compromise.
Our cPanel hosting plans include access to server logs and DNS management tools to help you diagnose and resolve issues like these.
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