Response Status Codes

HTTP Status Code 599 - Network Connect Timeout Error The HTTP status code 599 Network Connect Timeout Error is a non-standard code introduced by certain proxy and caching services. It…

HTTP Status Code 598 - Network Read Timeout Error The HTTP status code 598 Network Read Timeout Error is a non-standard status code used by some proxy servers to signal…

HTTP Status Code 561 - Unauthorized The HTTP status code 561 - Unauthorized is a non-standard code that might be used in specific applications or services to indicate that a…

HTTP Status Code 530 - Site Frozen The HTTP status code 530 is a non-standard status code sometimes used by certain web services or hosting providers to indicate that a…

HTTP Status Code 529 - The Service Is Overloaded The HTTP status code 529 indicates that the server is temporarily unable to handle the request due to being overloaded. Unlike…

HTTP Status Code 527 - Railgun Listener to Origin The HTTP status code 527 is specific to Cloudflare's infrastructure and indicates an error with the Railgun Listener to Origin connection.…

HTTP Status Code 526 - Invalid SSL Certificate The HTTP status code 526 indicates that the SSL certificate presented by the server is invalid. This status code is used by…

HTTP Status Code 525 - SSL Handshake Failed The HTTP status code 525 SSL Handshake Failed indicates that the server was unable to establish a secure connection with the client…

HTTP Status Code 524 - A Timeout Occurred The HTTP status code 524 indicates that a timeout occurred while establishing a connection between a server and its upstream server, typically…

HTTP Status Code 523 - Origin Is Unreachable The HTTP status code 523 Origin Is Unreachable indicates that a server, usually a CDN (Content Delivery Network) like Cloudflare, was unable…

HTTP Status Code 522 - Connection Timed Out The HTTP status code 522 indicates that a connection to the origin web server timed out. This error is specific to Cloudflare,…

HTTP Status Code 521 - Web Server Is Down The HTTP status code 521 Web Server Is Down is a non-standard status code used by the web infrastructure company Cloudflare.…

HTTP Status Code 520 - Web Server Is Returning an Unknown Error The HTTP status code 520 is an error response provided by Cloudflare when the origin server returns an…

HTTP Status Code 511 - Network Authentication Required The HTTP status code 511 Network Authentication Required indicates that the client needs to authenticate to gain network access. This status is…

HTTP Status Code 510 - Not Extended The HTTP status code 510 Not Extended is a server error response code that indicates further extensions to the request are required for…

HTTP Status Code 509 - Bandwidth Limit Exceeded Description The HTTP status code 509 Bandwidth Limit Exceeded is used when a server has exceeded the bandwidth limit that has been…

HTTP Status Code 508 - Loop Detected The HTTP Status Code 508 Loop Detected indicates that the server terminated an operation because it encountered an infinite loop while processing a…

HTTP Status Code 507 - Insufficient Storage The HTTP status code 507 Insufficient Storage is used by the Web Distributed Authoring and Versioning (WebDAV) protocol. It indicates that the server…

HTTP Status Code 506 - Variant Also Negotiates Description The HTTP status code 506 Variant Also Negotiates is a server error response. It indicates that the server has an internal…

505 HTTP Version Not Supported The HTTP status code 505 HTTP Version Not Supported indicates that the server does not support, or refuses to support, the HTTP protocol version that…

HTTP Status Code 504 - Gateway Timeout The HTTP status code 504 Gateway Timeout indicates that a server, acting as a gateway or proxy, did not receive a timely response…

HTTP Status Code 503 - Service Unavailable The HTTP status code 503 Service Unavailable indicates that the server is currently unable to handle the request due to temporary overloading or…

HTTP Status Code 502 - Bad Gateway The HTTP status code 502 Bad Gateway indicates that a server acting as a gateway or proxy received an invalid response from an…

HTTP Status Code 500 - Internal Server Error The HTTP status code 500 Internal Server Error is a general-purpose error message, indicating that the server encountered an unexpected condition that…

HTTP Status Code 498 - Invalid Token The HTTP status code 498 Invalid Token is a non-standard extension used to indicate that an authentication token provided with a request is…

HTTP Status Code 497 - HTTP Request Sent to HTTPS Port The HTTP status code 497 is a non-standard status code used by certain web servers to indicate that a…

HTTP Status Code 496 - SSL Certificate Required The HTTP status code 496 SSL Certificate Required is a non-standard status code, used by some web servers to indicate that a…

HTTP Status Code 495 - SSL Certificate Error The HTTP status code 495 is a non-standard status code used by some proxies, such as those from Nginx, to indicate that…

HTTP Status Code 494 - Request Header Too Large Description The HTTP status code 494 Request Header Too Large is a non-standard status code primarily used by specific server software,…

HTTP Status Code 464 - Incompatible Protocol The HTTP status code 464 Incompatible Protocol is a non-standard status code used to indicate that a request was made using a protocol…

HTTP Status Code 463 - Too Many Forwarded IP Addresses The HTTP status code 463, labeled as "Too Many Forwarded IP Addresses," is used to indicate that a request has…

HTTP Status Code 460 - Client Closed Connection Prematurely The HTTP status code 460 is a non-standard status code used to indicate that a client has closed the connection before…

HTTP Status Code 451 - Unavailable For Legal Reasons The HTTP status code 451 Unavailable For Legal Reasons indicates that the server is denying access to the requested resource due…

HTTP Status Code 450 - Blocked by Windows Parental Controls The HTTP status code 450 is a Microsoft-specific extension to the HTTP protocol. This status code indicates that the requested…

HTTP Status Code 449 - Retry With The HTTP status code 449 Retry With is a Microsoft extension to the HTTP standard. It is used by Microsoft servers, such as…

HTTP Status Code 444 - No Response The HTTP status code 444 No Response is a non-standard status code used by the Nginx web server to indicate that the server…

HTTP Status Code 440 - Login Time-Out The HTTP status code 440 Login Time-Out is a proprietary status code used by Microsoft Internet Information Services (IIS). It indicates that the…

HTTP Status Code 431 - Request Header Fields Too Large The HTTP status code 431 Request Header Fields Too Large indicates that the server is unable to process the request…

HTTP Status Code 430 The HTTP status code 430 is not a standard status code defined by the Internet Assigned Numbers Authority (IANA) or the HTTP/1.1 specification (RFC 7231). This…

HTTP Status Code 429 - Too Many Requests The HTTP 429 Too Many Requests response status code indicates that the user has sent too many requests in a given amount…

HTTP Status Code 428 - Precondition Required Description The HTTP 428 Precondition Required status code indicates that the origin server requires the request to be conditional. This response is sent…

HTTP Status Code 426 - Upgrade Required The HTTP 426 Upgrade Required status code is a client error response that indicates the server refuses to perform the requested action using…

HTTP Status Code 425 - Too Early The HTTP 425 Status Code "Too Early" is used to indicate that the server is unwilling to risk processing a request that might…

HTTP Status Code 424 - Failed Dependency The HTTP status code 424 Failed Dependency indicates that the request failed because it depended on another request that also failed. This status…

HTTP Status Code 423 - Locked The HTTP status code 423 Locked indicates that the resource being accessed is locked. This status code is part of the WebDAV (Web Distributed…

HTTP Status Code 422 - Unprocessable Entity The HTTP 422 Unprocessable Entity status code indicates that the server understands the content type of the request entity (e.g., JSON, XML), and…

HTTP Status Code 421 - Misdirected Request The HTTP 421 Misdirected Request status code indicates that the request was directed to a server that is unable to produce a response.…

HTTP Status Code 419 - Page Expired The HTTP status code 419 - Page Expired is a non-standard status code indicating that a session has expired or the requested page…