HTTP Status Code Lookup
Search the full list of HTTP status codes by number, name, or category, with plain-English explanations for each code.
How to read HTTP status codes
1xx — Informational
Request received, continuing process.
2xx — Success
Request received and understood.
3xx — Redirection
Further action needed to complete the request.
4xx / 5xx — Errors
Client (4xx) or server (5xx) failed to fulfill the request.
Frequently asked questions
Which HTTP status codes are best for SEO redirects?
Use 301 for permanent moves so search engines transfer authority, and 302 or 307 for temporary moves.
What does a 503 status mean for my site?
It means the server is temporarily unavailable, often due to maintenance or overload. It is not a permanent failure, so search engines will retry later.
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