This article lists standard and notable non-standard HTTP response status codes. Standardized codes are defined by IETF as documented in Request for Comments (RFC) publications and maintained by …

Jan 5, 2026 · Responses are grouped in five classes: The status codes listed below are defined by RFC 9110. Note: If you receive a response that is not listed here, it is a non-standard response, possibly …

Aug 9, 2024 · 5xx: Server Error – The server takes responsibility for these error status codes. An interim response. Indicates to the client that the initial part of the request has been received and has not yet …

Mar 24, 2025 · An HTTP status code is a three-digit number sent by a web server in response to a request from a client, such as a browser or a search engine crawler like Googlebot.

Jul 23, 2025 · When you visit a website or make a request online, your browser communicates with a server using HTTP (Hypertext Transfer Protocol). The server responds with a three-digit HTTP status …

Dec 26, 2025 · What they are: HTTP status codes are three-digit server responses that tell browsers whether web requests succeeded, failed or need redirection. Why they matter: Understanding what …

In the world of web development, HTTP error codes play a vital role in affecting the user experience and reputation of a website.