HTTP Status Code
Look up HTTP status codes and browse the complete reference of all standard HTTP response codes
Look Up a Status Code
Complete Reference
1xx Informational 4 codes
2xx Success 10 standard · 1 unofficial
3xx Redirection 9 codes · 2 deprecated
4xx Client Error 29 standard · 15 unofficial
400Bad Request 401Unauthorized 402Payment Required 403Forbidden 404Not Found 405Method Not Allowed 406Not Acceptable 407Proxy Authentication Required 408Request Timeout 409Conflict 410Gone 411Length Required 412Precondition Failed 413Content Too Large 414URI Too Long 415Unsupported Media Type 416Range Not Satisfiable 417Expectation Failed 418I'm a Teapot 421Misdirected Request 422Unprocessable Content 423Locked 424Failed Dependency 425Too Early 426Upgrade Required 428Precondition Required 429Too Many Requests 431Request Header Fields Too Large 451Unavailable For Legal Reasons
Unofficial & Vendor-Specific
419Page ExpiredLaravel 420Enhance Your CalmTwitter 430Request Header Fields Too LargeShopify 440Login Time-outMicrosoft IIS 444No ResponseNginx 449Retry WithMicrosoft IIS 450Blocked by Windows Parental ControlsMicrosoft 460Client Closed ConnectionAWS 463Too Many Forwarded IP AddressesAWS 494Request Header Too LargeNginx 495SSL Certificate ErrorNginx 496SSL Certificate RequiredNginx 497HTTP Request Sent to HTTPS PortNginx 499Client Closed RequestNginx 999Request DeniedLinkedIn5xx Server Error 11 standard · 12 unofficial
500Internal Server Error 501Not Implemented 502Bad Gateway 503Service Unavailable 504Gateway Timeout 505HTTP Version Not Supported 506Variant Also Negotiates 507Insufficient Storage 508Loop Detected 510Not Extended 511Network Authentication Required
Unofficial & Vendor-Specific
509Bandwidth Limit ExceededApache/cPanel 520Web Server Returns an Unknown ErrorCloudflare 521Web Server Is DownCloudflare 522Connection Timed OutCloudflare 523Origin Is UnreachableCloudflare 524A Timeout OccurredCloudflare 525SSL Handshake FailedCloudflare 526Invalid SSL CertificateCloudflare 527Railgun Listener to Origin ErrorCloudflare 530Origin DNS ErrorCloudflare 598Network Read Timeout ErrorProxy 599Network Connect Timeout ErrorProxy