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This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status code specifies one of five standard classes of responses. The optional message phrases shown are typical, but any human-readable alternative may be provided, or none at all. Unless otherwise stated, the status code is part of the HTTP standard (). The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes. All HTTP response status codes are separated into five classes or categories. The first digit of the status code defines the class of response, while the last two digits do not have any classifying or categorization role. There are five classes defined by the standard: * ''1xx informational response'' – the request was received, continuing process * ''2xx successful'' – the request was successfully received, understood, and accepted * ''3xx redirection'' – further action needs to be taken in order to complete the request * ''4xx client error'' – the request contains bad syntax or cannot be fulfilled * ''5xx server error'' – the server failed to fulfil an apparently valid request


1xx informational response

An informational response indicates that the request was received and understood. It is issued on a provisional basis while request processing continues. It alerts the client to wait for a final response. The message consists only of the status line and optional header fields, and is terminated by an empty line. As the HTTP/1.0 standard did not define any 1xx status codes, servers Emphasised words and phrases such as and represent interpretation guidelines as given by RFC 2119 send a 1xx response to an HTTP/1.0 compliant client except under experimental conditions. ;100 Continue : The server has received the request headers and the client should proceed to send the request body (in the case of a request for which a body needs to be sent; for example, a
POST Post or POST commonly refers to: *Mail, the postal system, especially in Commonwealth of Nations countries **An Post, the Irish national postal service **Canada Post, Canadian postal service **Deutsche Post, German postal service ** Iraqi Post, Ir ...
request). Sending a large request body to a server after a request has been rejected for inappropriate headers would be inefficient. To have a server check the request's headers, a client must send Expect: 100-continue as a header in its initial request and receive a 100 Continue status code in response before sending the body. If the client receives an error code such as 403 (Forbidden) or 405 (Method Not Allowed) then it should not send the request's body. The response 417 Expectation Failed indicates that the request should be repeated without the Expect header as it indicates that the server does not support expectations (this is the case, for example, of HTTP/1.0 servers). ;101 Switching Protocols : The requester has asked the server to switch protocols and the server has agreed to do so. ;102 Processing ( WebDAV; RFC 2518) : A WebDAV request may contain many sub-requests involving file operations, requiring a long time to complete the request. This code indicates that the server has received and is processing the request, but no response is available yet. This prevents the client from timing out and assuming the request was lost. ;103 Early Hints (RFC 8297) :Used to return some response headers before final HTTP message.


2xx success

This class of status codes indicates the action requested by the client was received, understood, and accepted. ;200 OK : Standard response for successful HTTP requests. The actual response will depend on the request method used. In a GET request, the response will contain an entity corresponding to the requested resource. In a POST request, the response will contain an entity describing or containing the result of the action. ;201 Created : The request has been fulfilled, resulting in the creation of a new resource. ;202 Accepted : The request has been accepted for processing, but the processing has not been completed. The request might or might not be eventually acted upon, and may be disallowed when processing occurs. ;203 Non-Authoritative Information (since HTTP/1.1) : The server is a transforming proxy (e.g. a ) that received a 200 OK from its origin, but is returning a modified version of the origin's response. ;204 No Content : The server successfully processed the request, and is not returning any content. ;205 Reset Content : The server successfully processed the request, asks that the requester reset its document view, and is not returning any content. ;206 Partial Content : The server is delivering only part of the resource (
byte serving Byte serving (other names: Range Requests; Byte Range Serving; Page on demand) is the process introduced in HTTP protocol 1.1 of sending only a portion of a message from a server to a client. Byte serving begins when an HTTP server advertises its ...
) due to a range header sent by the client. The range header is used by HTTP clients to enable resuming of interrupted downloads, or split a download into multiple simultaneous streams. ;207 Multi-Status (WebDAV; RFC 4918) : The message body that follows is by default an
XML Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. T ...
message and can contain a number of separate response codes, depending on how many sub-requests were made. ;208 Already Reported (WebDAV; RFC 5842) : The members of a DAV binding have already been enumerated in a preceding part of the (multistatus) response, and are not being included again. ;226 IM Used (RFC 3229) : The server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance.


3xx redirection

This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD. A user agent may automatically redirect a request. A user agent should detect and intervene to prevent cyclical redirects. ;300 Multiple Choices : Indicates multiple options for the resource from which the client may choose (via agent-driven content negotiation). For example, this code could be used to present multiple video format options, to list files with different filename extensions, or to suggest
word-sense disambiguation Word-sense disambiguation (WSD) is the process of identifying which sense of a word is meant in a sentence or other segment of context. In human language processing and cognition, it is usually subconscious/automatic but can often come to consci ...
. ; 301 Moved Permanently : This and all future requests should be directed to the given URI. ; 302 Found (Previously "Moved temporarily") : Tells the client to look at (browse to) another URL. The HTTP/1.0 specification (RFC 1945) required the client to perform a temporary redirect with the same method (the original describing phrase was "Moved Temporarily"), but popular browsers implemented 302 redirects by changing the method to GET. Therefore, HTTP/1.1 added status codes 303 and 307 to distinguish between the two behaviours. ; 303 See Other (since HTTP/1.1) : The response to the request can be found under another URI using the GET method. When received in response to a POST (or PUT/DELETE), the client should presume that the server has received the data and should issue a new GET request to the given URI. ;304 Not Modified : Indicates that the resource has not been modified since the version specified by the request headers If-Modified-Since or If-None-Match. In such case, there is no need to retransmit the resource since the client still has a previously-downloaded copy. ;305 Use Proxy (since HTTP/1.1) :The requested resource is available only through a proxy, the address for which is provided in the response. For security reasons, many HTTP clients (such as
Mozilla Firefox Mozilla Firefox, or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. It uses the Gecko rendering engine to display web pages, which implements current an ...
and Internet Explorer) do not obey this status code. ;306 Switch Proxy : No longer used. Originally meant "Subsequent requests should use the specified proxy." ;307 Temporary Redirect (since HTTP/1.1) : In this case, the request should be repeated with another URI; however, future requests should still use the original URI. In contrast to how 302 was historically implemented, the request method is not allowed to be changed when reissuing the original request. For example, a POST request should be repeated using another POST request. ;308 Permanent Redirect : This and all future requests should be directed to the given URI. 308 parallel the behaviour of 301, but . So, for example, submitting a form to a permanently redirected resource may continue smoothly.


4xx client errors

This class of status code is intended for situations in which the error seems to have been caused by the client. Except when responding to a HEAD request, the server include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. These status codes are applicable to any request method. User agents display any included entity to the user. ;400 Bad Request : The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing). ;401 Unauthorized : Similar to 403 Forbidden, but specifically for use when authentication is required and has failed or has not yet been provided. The response must include a WWW-Authenticate header field containing a challenge applicable to the requested resource. See Basic access authentication and Digest access authentication. 401 semantically means "unauthorised", the user does not have valid authentication credentials for the target resource. : Note: Some sites incorrectly issue HTTP 401 when an
IP address An Internet Protocol address (IP address) is a numerical label such as that is connected to a computer network that uses the Internet Protocol for communication.. Updated by . An IP address serves two main functions: network interface ident ...
is banned from the website (usually the website domain) and that specific address is refused permission to access a website. ;402 Payment Required : Reserved for future use. The original intention was that this code might be used as part of some form of digital cash or micropayment scheme, as proposed, for example, by
GNU Taler GNU Taler is a free software-based microtransaction and electronic payment system. Unlike most other decentralized payment systems, GNU Taler does not use a blockchain. A blind signature is used to protect the privacy of users as it prevents the ...
, but that has not yet happened, and this code is not widely used. Google Developers API uses this status if a particular developer has exceeded the daily limit on requests. Sipgate uses this code if an account does not have sufficient funds to start a call. Shopify uses this code when the store has not paid their fees and is temporarily disabled. Stripe uses this code for failed payments where parameters were correct, for example blocked fraudulent payments. ;
403 Forbidden HTTP 403 is an HTTP status code meaning access to the requested resource is forbidden. The server understood the request, but will not fulfill it. Specifications HTTP 403 provides a distinct error case from HTTP 401; while HTTP 401 is returned ...
: The request contained valid data and was understood by the server, but the server is refusing action. This may be due to the user not having the necessary permissions for a resource or needing an account of some sort, or attempting a prohibited action (e.g. creating a duplicate record where only one is allowed). This code is also typically used if the request provided authentication by answering the WWW-Authenticate header field challenge, but the server did not accept that authentication. The request should not be repeated. ; 404 Not Found : The requested resource could not be found but may be available in the future. Subsequent requests by the client are permissible. ;405 Method Not Allowed : A request method is not supported for the requested resource; for example, a GET request on a form that requires data to be presented via
POST Post or POST commonly refers to: *Mail, the postal system, especially in Commonwealth of Nations countries **An Post, the Irish national postal service **Canada Post, Canadian postal service **Deutsche Post, German postal service ** Iraqi Post, Ir ...
, or a PUT request on a read-only resource. ;406 Not Acceptable : The requested resource is capable of generating only content not acceptable according to the Accept headers sent in the request. See
Content negotiation Content negotiation refers to mechanisms defined as a part of HTTP that make it possible to serve different versions of a document (or more generally, representations of a resource) at the same URI, so that user agents can specify which version fi ...
. ;407 Proxy Authentication Required :The client must first authenticate itself with the
proxy Proxy may refer to: * Proxy or agent (law), a substitute authorized to act for another entity or a document which authorizes the agent so to act * Proxy (climate), a measured variable used to infer the value of a variable of interest in climate re ...
. ;408 Request Timeout : The server timed out waiting for the request. According to HTTP specifications: "The client did not produce a request within the time that the server was prepared to wait. The client MAY repeat the request without modifications at any later time." ;409 Conflict : Indicates that the request could not be processed because of conflict in the current state of the resource, such as an edit conflict between multiple simultaneous updates. ;410 Gone : Indicates that the resource requested was previously in use but is no longer available and will not be available again. This should be used when a resource has been intentionally removed and the resource should be purged. Upon receiving a 410 status code, the client should not request the resource in the future. Clients such as search engines should remove the resource from their indices. Most use cases do not require clients and search engines to purge the resource, and a "404 Not Found" may be used instead. ;411 Length Required : The request did not specify the length of its content, which is required by the requested resource. ;412 Precondition Failed : The server does not meet one of the preconditions that the requester put on the request header fields. ;413 Payload Too Large : The request is larger than the server is willing or able to process. Previously called "Request Entity Too Large" in RFC 2616. ;414 URI Too Long : The URI provided was too long for the server to process. Often the result of too much data being encoded as a query-string of a GET request, in which case it should be converted to a POST request. Called "Request-URI Too Long" previously in RFC 2616. ;415 Unsupported Media Type : The request entity has a media type which the server or resource does not support. For example, the client uploads an image as image/svg+xml, but the server requires that images use a different format. ;416 Range Not Satisfiable : The client has asked for a portion of the file (
byte serving Byte serving (other names: Range Requests; Byte Range Serving; Page on demand) is the process introduced in HTTP protocol 1.1 of sending only a portion of a message from a server to a client. Byte serving begins when an HTTP server advertises its ...
), but the server cannot supply that portion. For example, if the client asked for a part of the file that lies beyond the end of the file. Called "Requested Range Not Satisfiable" previously RFC 2616. ;417 Expectation Failed : The server cannot meet the requirements of the Expect request-header field. ; 418 I'm a teapot (RFC 2324, RFC 7168) :This code was defined in 1998 as one of the traditional IETF April Fools' jokes, in RFC 2324, '' Hyper Text Coffee Pot Control Protocol'', and is not expected to be implemented by actual HTTP servers. The RFC specifies this code should be returned by teapots requested to brew coffee. This HTTP status is used as an Easter egg in some websites, such as Google.com's "I'm a teapot" easter egg. Sometimes, this status code is also used as a response to a blocked request, instead of the more appropriate 403 Forbidden. ;421 Misdirected Request : The request was directed at a server that is not able to produce a response (for example because of connection reuse). ;422 Unprocessable Entity : The request was well-formed but was unable to be followed due to semantic errors. ;423 Locked (WebDAV; RFC 4918) : The resource that is being accessed is locked. ;424 Failed Dependency (WebDAV; RFC 4918) : The request failed because it depended on another request and that request failed (e.g., a PROPPATCH). ;425 Too Early (RFC 8470) :Indicates that the server is unwilling to risk processing a request that might be replayed. ;426 Upgrade Required : The client should switch to a different protocol such as TLS/1.3, given in the
Upgrade header The Upgrade header field is an List of HTTP header fields, HTTP header field introduced in HTTP/1.1. In the exchange, the client begins by making a cleartext request, which is later upgraded to a newer HTTP protocol version or switched to a differ ...
field. ;428 Precondition Required (RFC 6585) :The origin server requires the request to be conditional. Intended to prevent the 'lost update' problem, where a client GETs a resource's state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a conflict. ;429 Too Many Requests (RFC 6585) :The user has sent too many requests in a given amount of time. Intended for use with rate-limiting schemes. ;431 Request Header Fields Too Large (RFC 6585) :The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large. ; 451 Unavailable For Legal Reasons (RFC 7725) : A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource. The code 451 was chosen as a reference to the novel ''
Fahrenheit 451 ''Fahrenheit 451'' is a 1953 dystopian novel by American writer Ray Bradbury. Often regarded as one of his best works, ''Fahrenheit 451'' presents an American society where books have been personified and outlawed and "firemen" burn any that ar ...
'' (see the Acknowledgements in the RFC).


5xx server errors

The server failed to fulfil a request. Response status codes beginning with the digit "5" indicate cases in which the server is aware that it has encountered an error or is otherwise incapable of performing the request. Except when responding to a HEAD request, the server include an entity containing an explanation of the error situation, and indicate whether it is a temporary or permanent condition. Likewise, user agents display any included entity to the user. These response codes are applicable to any request method. ;500 Internal Server Error : A generic error message, given when an unexpected condition was encountered and no more specific message is suitable. ;501 Not Implemented : The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API). ;502 Bad Gateway : The server was acting as a gateway or proxy and received an invalid response from the upstream server. ;503 Service Unavailable : The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a temporary state. ;504 Gateway Timeout : The server was acting as a gateway or proxy and did not receive a timely response from the upstream server. ;505 HTTP Version Not Supported : The server does not support the HTTP version used in the request. ;506 Variant Also Negotiates (RFC 2295) : Transparent
content negotiation Content negotiation refers to mechanisms defined as a part of HTTP that make it possible to serve different versions of a document (or more generally, representations of a resource) at the same URI, so that user agents can specify which version fi ...
for the request results in a
circular reference A circular reference is a series of references where the last object references the first, resulting in a closed loop. In language A circular reference is not to be confused with the logical fallacy of a circular argument. Although a circular ...
. ;507 Insufficient Storage (WebDAV; RFC 4918) : The server is unable to store the representation needed to complete the request. ;508 Loop Detected (WebDAV; RFC 5842) : The server detected an infinite loop while processing the request (sent instead of 208 Already Reported). ;510 Not Extended (RFC 2774) : Further extensions to the request are required for the server to fulfill it. ;511 Network Authentication Required (RFC 6585) :The client needs to authenticate to gain network access. Intended for use by intercepting proxies used to control access to the network (e.g., "
captive portal A captive portal is a web page accessed with a web browser that is displayed to newly connected users of a Wi-Fi or wired network before they are granted broader access to network resources. Captive portals are commonly used to present a landing ...
s" used to require agreement to Terms of Service before granting full Internet access via a
Wi-Fi hotspot A hotspot is a physical location where people can obtain Internet access, typically using Wi-Fi technology, via a wireless local-area network (WLAN) using a router connected to an Internet service provider. Public hotspots may be created ...
). :


Unofficial codes

The following codes are not specified by any standard. ; 419 Page Expired ( Laravel Framework) :Used by the Laravel Framework when a CSRF Token is missing or expired. ; 420 Method Failure (
Spring Framework The Spring Framework is an application framework and inversion of control container for the Java platform. The framework's core features can be used by any Java application, but there are extensions for building web applications on top of the Jav ...
) : A deprecated response used by the Spring Framework when a method has failed. ; 420 Enhance Your Calm ( Twitter) : Returned by version 1 of the Twitter Search and Trends API when the client is being rate limited; versions 1.1 and later use the 429 Too Many Requests response code instead. The phrase "Enhance your calm" comes from the
1993 movie The year 1993 in film involved many significant films, including the blockbuster hits ''Jurassic Park'', '' The Fugitive'' and '' The Firm''. (For more about films in foreign languages, check sources in those languages.) Highest-grossing films T ...
'' Demolition Man'', and its association with this number is likely a reference to cannabis. ; 430 Request Header Fields Too Large ( Shopify) : Used by Shopify, instead of the 429 Too Many Requests response code, when too many URLs are requested within a certain time frame. ; 450 Blocked by Windows Parental Controls (Microsoft) : The Microsoft extension code indicated when Windows Parental Controls are turned on and are blocking access to the requested webpage. ; 498 Invalid Token (Esri) : Returned by ArcGIS for Server. Code 498 indicates an expired or otherwise invalid token. ; 499 Token Required (Esri) : Returned by ArcGIS for Server. Code 499 indicates that a token is required but was not submitted. ; 509 Bandwidth Limit Exceeded (
Apache Web Server The Apache HTTP Server ( ) is a free and open-source cross-platform web server software, released under the terms of Apache License 2.0. Apache is developed and maintained by an open community of developers under the auspices of the Apache Soft ...
/
cPanel cPanel is a web hosting control panel software developed by cPanel, LLC. It provides a graphical interface (GUI) and automation tools designed to simplify the process of hosting a web site to the website owner or the "end user". It enables admin ...
) : The server has exceeded the bandwidth specified by the server administrator; this is often used by shared hosting providers to limit the bandwidth of customers. ; 529 Site is overloaded : Used by
Qualys Qualys, Inc. provides cloud security, compliance and related services and is based in Foster City, California. Qualys provides vulnerability management solutions using a "software as a service" (SaaS) model. It has added cloud-based compliance an ...
in the SSLLabs server testing API to signal that the site can't process the request. ; 530 Site is frozen : Used by the
Pantheon Pantheon may refer to: * Pantheon (religion), a set of gods belonging to a particular religion or tradition, and a temple or sacred building Arts and entertainment Comics *Pantheon (Marvel Comics), a fictional organization * ''Pantheon'' (Lone St ...
web platform to indicate a site that has been frozen due to inactivity. ; 598 (Informal convention) Network read timeout error : Used by some HTTP proxies to signal a network read timeout behind the proxy to a client in front of the proxy. ; 599 Network Connect Timeout Error : An error used by some HTTP proxies to signal a network connect timeout behind the proxy to a client in front of the proxy.


Internet Information Services

Microsoft's Internet Information Services (IIS) web server expands the 4xx error space to signal errors with the client's request. ; 440 Login Time-out : The client's session has expired and must log in again. ; 449 Retry With : The server cannot honour the request because the user has not provided the required information. ; 451 Redirect : Used in Exchange ActiveSync when either a more efficient server is available or the server cannot access the users' mailbox. The client is expected to re-run the HTTP AutoDiscover operation to find a more appropriate server. IIS sometimes uses additional decimal sub-codes for more specific information, however these sub-codes only appear in the response payload and in documentation, not in the place of an actual HTTP status code.


nginx

The nginx web server software expands the 4xx error space to signal issues with the client's request. ; 444 No Response : Used internally to instruct the server to return no information to the client and close the connection immediately. ; 494 Request header too large : Client sent too large request or too long header line. ; 495 SSL Certificate Error :An expansion of the 400 Bad Request response code, used when the client has provided an invalid
client certificate In cryptography, a client certificate is a type of digital certificate that is used by client systems to make authenticated requests to a remote server. Client certificates play a key role in many mutual authentication Mutual authentication or two ...
. ; 496 SSL Certificate Required : An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. ; 497 HTTP Request Sent to HTTPS Port : An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. ; 499 Client Closed Request : Used when the client has closed the request before the server could send a response.


Cloudflare

Cloudflare Cloudflare, Inc. is an American content delivery network and DDoS mitigation company, founded in 2009. It primarily acts as a reverse proxy between a website's visitor and the Cloudflare customer's hosting provider. Its headquarters are in San ...
's reverse proxy service expands the 5xx series of errors space to signal issues with the origin server. ; 520 Web Server Returned an Unknown Error : The origin server returned an empty, unknown, or unexpected response to Cloudflare. ; 521 Web Server Is Down : The origin server refused connections from Cloudflare. Security solutions at the origin may be blocking legitimate connections from certain Cloudflare IP addresses. ; 522 Connection Timed Out : Cloudflare timed out contacting the origin server. ; 523 Origin Is Unreachable : Cloudflare could not reach the origin server; for example, if the
DNS record The Domain Name System (DNS) is a hierarchical and distributed naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names assigned t ...
s for the origin server are incorrect or missing. ; 524 A Timeout Occurred : Cloudflare was able to complete a TCP connection to the origin server, but did not receive a timely HTTP response. ; 525 SSL Handshake Failed : Cloudflare could not negotiate a SSL/TLS handshake with the origin server. ; 526 Invalid SSL Certificate : Cloudflare could not validate the SSL certificate on the origin web server. Also used by
Cloud Foundry Cloud Foundry is an open source, multi-cloud application platform as a service (PaaS) governed by the Cloud Foundry Foundation, a 501(c)(6) organization. The software was originally developed by VMware, transferred to Pivotal Software (a joint ...
's gorouter. ; 527 Railgun Error : Error 527 indicates an interrupted connection between Cloudflare and the origin server's Railgun server. ; 530 : Error 530 is returned along with a 1xxx error.


AWS Elastic Load Balancer

Amazon Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technology co ...
's
Elastic Load Balancing Elastic is a word often used to describe or identify certain types of elastomer, elastic used in garments or stretchable fabrics. Elastic may also refer to: Alternative name * Rubber band, ring-shaped band of rubber used to hold objects togethe ...
adds a few custom return codes ; 460 : Client closed the connection with the load balancer before the idle timeout period elapsed. Typically when client timeout is sooner than the Elastic Load Balancer's timeout. ; 463 : The load balancer received an X-Forwarded-For request header with more than 30 IP addresses. ; 561 Unauthorized : An error around authentication returned by a server registered with a load balancer. You configured a listener rule to authenticate users, but the identity provider (IdP) returned an error code when authenticating the user.


Caching warning codes (obsoleted)

The following caching related warning codes were specified under . Unlike the other status codes above, these were not sent as the response status in the HTTP protocol, but as part of the "Warning" HTTP header. Since this "Warning" header is often neither sent by servers nor acknowledged by clients, this header and its codes were obsoleted by the HTTP Working Group in 2022 with . ; 110 Response is Stale : The response provided by a cache is stale (the content's age exceeds a maximum age set by a Cache-Control header or heuristically chosen lifetime). ; 111 Revalidation Failed : The cache was unable to validate the response, due to an inability to reach the origin server. ; 112 Disconnected Operation : The cache is intentionally disconnected from the rest of the network. ; 113 Heuristic Expiration : The cache heuristically chose a freshness lifetime greater than 24 hours and the response's age is greater than 24 hours. ; 199 Miscellaneous Warning : Arbitrary, non-specific warning. The warning text may be logged or presented to the user. ; 214 Transformation Applied : Added by a proxy if it applies any transformation to the representation, such as changing the content encoding, media type or the like. ; 299 Miscellaneous Persistent Warning : Same as 199, but indicating a persistent warning.


See also

* Custom error pages * List of FTP server return codes *
List of HTTP header fields A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby union ...
* List of SMTP server return codes *
Common Log Format For computer log management, the Common Log Format, also known as the NCSA Common log format, (after NCSA HTTPd) is a standardized text file format used by web servers when generating server log files. Because the format is standardized, the fil ...


Explanatory notes


References


External links

*
Hypertext Transfer Protocol (HTTP) Status Code Registry
{{DEFAULTSORT:List Of Http status codes HTTP status codes