Stay ahead of the game
Everyone has at some time clicked on a link to a website to see an error message that merely says ‘404 page not found’, but apart from SEO and web development professionals, few people understand what these codes mean, let alone how to check them.
The different numbers are in fact the codes used in URL headers to describe the current status of a page in terms of whether it is active, redirected, password protected or has been removed. They are important tools for developers and hosting companies as they allow them to redirect sites or move them temporarily to carry out updates, etc. However, if the wrong code is entered, it can have serious implications as the website in question will not be displayed correctly.
But, with SearchEngineOptimization.co.uk it’s easy to verify the status of a website with our simple header checker tool that can give you an instant overview of the status codes currently in use.
Deciphering the numbers
Using the header checker is simple. Just type a web address into the text box and it will produce an instant report on the header code for that domain and its current status.
For example, if the code is 200 then the status of the site is OK, whereas if it is 302 it has been temporarily moved.
Worried about not knowing what the header codes mean? The key to understanding the status codes is to know what the different numbers represent and with our fast and uncomplicated header checker anyone can verify the status of their website, even if they have no prior knowledge of html or web development.
Along with the status code the report also includes a list of the most common status codes with descriptions, so absolutely anyone can understand what each code signifies.
A quick overview
Some of the most common status codes likely to arise from the header checker are:
- 200 OK
- — This usually indicates that a website is working normally and has not been redirected
- 301 Moved Permanently
- — If the website has been permanently moved to a new URL, then this header code is used to ensure that traffic is redirected to the new domain.
- 302 Moved temporarily
- — If your website has been temporarily moved, but will be moved back to its original URL, then this code should appear when you enter your URL into the header checker.
- 304 Not Modified
- — The website has not been modified, which is not an error, but this code is sometimes used by search engines to determine if sites are out of date.
- 307 Temporary Redirect
- — This is very similar to code 302 and indicates a temporary redirect of the site.
- 401 Unauthorized
- — This ensures that the content of a particular page is not in the public domain and requires a password or authentication to be viewed.
- 404 Not Found
- — The server cannot find the page requested. If this error code appears in the header checker but the page on your site should be live than action is required.
- 410 Gone
- — The URL no longer exists on the server.

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