HTTP Status Code Lookup
Look up any HTTP status code and understand what it means and what to do.
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How it works
The list follows the official IANA registry (RFC 9110 and related RFCs), plus a few widely seen unofficial codes (like Cloudflare's 52x), marked as such. Each entry explains when it's used and, for errors, the usual cause.
FAQ
301 or 302?
301 is permanent (search engines transfer ranking to the new URL); 302 is temporary. For SEO-friendly moves use 301 or 308.