httpstatuses/contents/codes/404.md

---
set: 4
code: 404
title: Not Found
references:
    "Rails HTTP Status Symbol": ":not_found"
    "Go HTTP Status Constant": "http.StatusNotFound"
    "Symfony HTTP Status Constant": "Response::HTTP_NOT_FOUND"
    "Python2 HTTP Status Constant": "httplib.NOT_FOUND"
    "Python3+ HTTP Status Constant": "http.client.NOT_FOUND"
    "Python3.5+ HTTP Status Constant": "http.HTTPStatus.NOT_FOUND"
---

The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.

A 404 status code does not indicate whether this lack of representation is temporary or permanent; the [410 Gone](/410) status code is preferred over 404 if the origin server knows, presumably through some configurable means, that the condition is likely to be permanent.

A 404 response is cacheable by default; i.e., unless otherwise indicated by the method definition or explicit cache controls<sup>[1](#ref-1)</sup>.

---

* <span id="ref-1"><sup>1</sup> Calculating Heuristic Freshness
[RFC7234 Section 4.2.2][2]</span>
* Source: [RFC7231 6.5.4][1]

[1]: <http://tools.ietf.org/html/rfc7231#section-6.5.4>
[2]: <http://tools.ietf.org/html/rfc7234#section-4.2.2>
Adds placeholder codes for development 2015-11-06 21:39:33 +01:00			`---`
			`set: 4`
			`code: 404`
			`title: Not Found`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00			`references:`
			`"Rails HTTP Status Symbol": ":not_found"`
Add Go status constants 2016-01-27 23:08:33 +01:00			`"Go HTTP Status Constant": "http.StatusNotFound"`
Add Symfony HTTP Status Constant references (#48) 2016-04-19 15:19:17 +02:00			`"Symfony HTTP Status Constant": "Response::HTTP_NOT_FOUND"`
Add Python status constants (#57) * Add Python status constants * Add Python 2, Python 3+, Python 3.5+ status constants 2016-05-22 01:07:17 +02:00			`"Python2 HTTP Status Constant": "httplib.NOT_FOUND"`
			`"Python3+ HTTP Status Constant": "http.client.NOT_FOUND"`
			`"Python3.5+ HTTP Status Constant": "http.HTTPStatus.NOT_FOUND"`
Adds placeholder codes for development 2015-11-06 21:39:33 +01:00			`---`

Remove markdown line limit (#52) * Removes line length limit from Status Code Markdown This will make the data easier to use when we develop the API, it needs to be consistent, arbitrary new lines (especially in text format) will be a major issue, so some sort of workaround would have to be implemented, easier to simply fix the source files. * Removes line length limit from misc. Markdown files 2016-04-23 02:12:07 +02:00			`The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.`
Gives 4xx codes simple opening paragraphs 2015-11-07 06:45:46 +01:00
Remove markdown line limit (#52) * Removes line length limit from Status Code Markdown This will make the data easier to use when we develop the API, it needs to be consistent, arbitrary new lines (especially in text format) will be a major issue, so some sort of workaround would have to be implemented, easier to simply fix the source files. * Removes line length limit from misc. Markdown files 2016-04-23 02:12:07 +02:00			`A 404 status code does not indicate whether this lack of representation is temporary or permanent; the [410 Gone](/410) status code is preferred over 404 if the origin server knows, presumably through some configurable means, that the condition is likely to be permanent.`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00
Remove markdown line limit (#52) * Removes line length limit from Status Code Markdown This will make the data easier to use when we develop the API, it needs to be consistent, arbitrary new lines (especially in text format) will be a major issue, so some sort of workaround would have to be implemented, easier to simply fix the source files. * Removes line length limit from misc. Markdown files 2016-04-23 02:12:07 +02:00			`A 404 response is cacheable by default; i.e., unless otherwise indicated by the method definition or explicit cache controls<sup>[1](#ref-1)</sup>.`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00
Improves 4xx class status codes with referencing 2015-11-09 02:44:05 +01:00			`---`

			`* <span id="ref-1"><sup>1</sup> Calculating Heuristic Freshness`
			`[RFC7234 Section 4.2.2][2]</span>`
			`* Source: [RFC7231 6.5.4][1]`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00
			`[1]: <http://tools.ietf.org/html/rfc7231#section-6.5.4>`
Add Go status constants 2016-01-27 23:08:33 +01:00			`[2]: <http://tools.ietf.org/html/rfc7234#section-4.2.2>`