HTTP Status Codes List

How to use this list

• Start with class intent: 1xx signals, 2xx success, 3xx redirects, 4xx caller issues, 5xx service failures.
• Open the status page when you need a short definition and adjacent code comparisons.
• Open the full guide when you need troubleshooting steps and implementation detail.

Fast triage path

If you are debugging production traffic, separate client-side 4xx from server-side 5xx first, then validate exact semantics with comparison pages before changing behavior.

Open comparison index · Client error hub · Server error hub

1xx Informational

• HTTP 100 — Continue
• HTTP 101 — Switching Protocols
• HTTP 102 — Processing
• HTTP 103 — Early Hints
• HTTP 104 — Upload Resumption Supported

2xx Success

• HTTP 200 — OK
• HTTP 201 — Created
• HTTP 202 — Accepted
• HTTP 203 — Non-Authoritative Information
• HTTP 204 — No Content
• HTTP 205 — Reset Content
• HTTP 206 — Partial Content
• HTTP 207 — Multi-Status
• HTTP 208 — Already Reported
• HTTP 226 — IM Used

3xx Redirect Codes

• HTTP 300 — Multiple Choices
• HTTP 301 — Moved Permanently
• HTTP 302 — Found
• HTTP 303 — See Other
• HTTP 304 — Not Modified
• HTTP 305 — Use Proxy
• HTTP 306 — Unused
• HTTP 307 — Temporary Redirect
• HTTP 308 — Permanent Redirect

4xx Client Errors

• HTTP 400 — Bad Request
• HTTP 401 — Unauthorized
• HTTP 402 — Payment Required
• HTTP 403 — Forbidden
• HTTP 404 — Not Found
• HTTP 405 — Method Not Allowed
• HTTP 406 — Not Acceptable
• HTTP 407 — Proxy Authentication Required
• HTTP 408 — Request Timeout
• HTTP 409 — Conflict
• HTTP 410 — Gone
• HTTP 411 — Length Required
• HTTP 412 — Precondition Failed
• HTTP 413 — Content Too Large
• HTTP 414 — URI Too Long
• HTTP 415 — Unsupported Media Type
• HTTP 416 — Range Not Satisfiable
• HTTP 417 — Expectation Failed
• HTTP 418 — Unused
• HTTP 421 — Misdirected Request
• HTTP 422 — Unprocessable Content
• HTTP 423 — Locked
• HTTP 424 — Failed Dependency
• HTTP 425 — Too Early
• HTTP 426 — Upgrade Required
• HTTP 427 — Unassigned
• HTTP 428 — Precondition Required
• HTTP 429 — Too Many Requests
• HTTP 430 — Unassigned
• HTTP 431 — Request Header Fields Too Large
• HTTP 451 — Unavailable For Legal Reasons

5xx Server Errors

• HTTP 500 — Internal Server Error
• HTTP 501 — Not Implemented
• HTTP 502 — Bad Gateway
• HTTP 503 — Service Unavailable
• HTTP 504 — Gateway Timeout
• HTTP 505 — HTTP Version Not Supported
• HTTP 506 — Variant Also Negotiates
• HTTP 507 — Insufficient Storage
• HTTP 508 — Loop Detected
• HTTP 509 — Unassigned
• HTTP 510 — Not Extended
• HTTP 511 — Network Authentication Required