A Complete List + Explanations

What Are HTTP Status Codes?

An HTTP status code is a three-digit number a server generates in response to a browser’s request. Like 404, for example, which you’ve likely seen before.

Every time you visit a website, your browser sends a request to the site’s server. Then, the server responds with an HTTP code status.

It’s like they’re having a conversation. And each code indicates whether things are working or something is wrong.

The first digit in each status code begins with a number between one and five, indicating the code’s category. The second two digits are for specific information under the category.

For example, let’s use 404 again.

The first digit (4) indicates a client error. And specifically, 404 means the server couldn’t find the requested resource.

Meanwhile, 402 also shows a client error. And the second and third digits tell us the server found the page but can’t access it due to a payment being required.

Let’s look at the different HTTP status categories and codes and how they can affect your SEO.

The Complete List of HTTP Status Codes