Find HTTP response codes, filter by response class and inspect concise meanings with specification links. A private, local reference with clear labels for temporary, deprecated and unused entries.
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1xx informational · 2xx success · 3xx redirection · 4xx client error · 5xx server error. A class alone does not determine retry behavior or cacheability.
Local snapshot checked 20 October 2026; registry updated 15 September 2025. IANA registry ↗. Source links open external documentation only when selected.
Concise explanations help you find the right specification.
Read the specification ↗This is a reference, not a website checker. It does not contact a URL. Vendor-specific and unassigned codes are omitted; inclusion does not mean a code is recommended or an Internet Standard.
| Code | Name | Label | Quick meaning |
|---|---|---|---|
| Continue | registered | Continue sending the request. | |
| Switching Protocols | registered | Changing the connection protocol. | |
| Processing | registered | WebDAV request is still being processed. | |
| Early Hints | registered | Preparation hints before the final response. | |
| Upload Resumption Supported | temporary | Signals support for resuming an upload. | |
| OK | registered | The request succeeded. | |
| Created | registered | A resource was created. | |
| Accepted | registered | Accepted; processing remains incomplete. | |
| Non-Authoritative Information | registered | A proxy transformed content. | |
| No Content | registered | Success without response content. | |
| Reset Content | registered | Reset the document view. | |
| Partial Content | registered | A requested range follows. | |
| Multi-Status | registered | WebDAV results for multiple resources or properties. | |
| Already Reported | registered | WebDAV binding already covered in this response. | |
| IM Used | registered | A delta-encoded representation follows. | |
| Multiple Choices | registered | Choose among available representations. | |
| Moved Permanently | registered | Resource moved permanently. | |
| Found | registered | Resource moved temporarily. | |
| See Other | registered | Retrieve a different resource. | |
| Not Modified | registered | Reuse the cached representation. | |
| Use Proxy | deprecated | Deprecated proxy redirection. | |
| (Unused) | unused | Reserved; no current meaning. | |
| Temporary Redirect | registered | Temporary move; preserve method. | |
| Permanent Redirect | registered | Permanent move; preserve method. | |
| Bad Request | registered | The request is invalid. | |
| Unauthorized | registered | Valid authentication credentials required. | |
| Payment Required | reserved | Reserved for future use. | |
| Forbidden | registered | The server refuses fulfillment. | |
| Not Found | registered | Resource unavailable or undisclosed. | |
| Method Not Allowed | registered | Method unavailable for resource. | |
| Not Acceptable | registered | No acceptable representation available. | |
| Proxy Authentication Required | registered | Proxy authentication is required. | |
| Request Timeout | registered | Request completion took too long. | |
| Conflict | registered | Conflict with resource state. | |
| Gone | registered | Resource likely permanently unavailable. | |
| Length Required | registered | Content length is required. | |
| Precondition Failed | registered | A request precondition failed. | |
| Content Too Large | registered | Request content exceeds limits. | |
| URI Too Long | registered | Request URI exceeds limits. | |
| Unsupported Media Type | registered | Unsupported request content format. | |
| Range Not Satisfiable | registered | Requested range cannot apply. | |
| Expectation Failed | registered | Request expectation cannot succeed. | |
| (Unused) | unused | Reserved; no current meaning. | |
| Misdirected Request | registered | Wrong server for request. | |
| Unprocessable Content | registered | Content instructions cannot be processed. | |
| Locked | registered | WebDAV resource is locked. | |
| Failed Dependency | registered | A prerequisite WebDAV action failed. | |
| Too Early | registered | Replay risk: retry outside early data. | |
| Upgrade Required | registered | A protocol upgrade is required. | |
| Precondition Required | registered | Send a conditional request to avoid lost updates. | |
| Too Many Requests | registered | Request rate exceeds the server’s limit. | |
| Request Header Fields Too Large | registered | Request headers exceed the server’s size limit. | |
| Unavailable For Legal Reasons | registered | Access is blocked because of a legal demand. | |
| Internal Server Error | registered | Unexpected server-side failure. | |
| Not Implemented | registered | Required functionality is unsupported. | |
| Bad Gateway | registered | Invalid upstream response received. | |
| Service Unavailable | registered | Service is temporarily unavailable. | |
| Gateway Timeout | registered | Upstream response timed out. | |
| HTTP Version Not Supported | registered | Unsupported HTTP major version. | |
| Variant Also Negotiates | registered | Server negotiation configuration creates a circular reference. | |
| Insufficient Storage | registered | Insufficient storage to complete the WebDAV action. | |
| Loop Detected | registered | WebDAV operation encountered a binding loop. | |
| Not Extended | obsolete | Historic HTTP extension negotiation code; obsoleted. | |
| Network Authentication Required | registered | Authenticate to gain network access; often a captive portal. |
Search and filtering run entirely in your browser using a bundled registry snapshot. Search terms are never uploaded or stored, and no website is contacted for a status check. Source links let you consult authoritative documentation when you choose.
No. This is an offline reference after the page has loaded. It never fetches a URL, sends your search terms or stores search history. Selecting an external source link opens the official documentation in another tab.
The bundled IANA snapshot was checked on 20 October 2026, with a registry update date of 15 September 2025. It is not refreshed automatically. Code 104 has a temporary registration expiring 13 November 2026 in this snapshot; consult IANA for subsequent changes. All registry entries are included, except unassigned ranges and codes.
The IANA registry labels 418 (Unused), although the historical nickname I’m a teapot remains searchable. Other historical aliases, including Payload Too Large and Unprocessable Entity, are searchable while current registry names are displayed.
No. Regular entries means entries without one of this tool’s special labels; it does not assert standards-track status or universal support. The tool separately labels temporary, deprecated, unused, obsoleted and future-reserved entries. The linked specifications define the exact requirements.
Unassigned and vendor-specific codes are not listed. An empty search result does not prove a response is impossible or invalid. Clear class and label filters if they hide a known code; consult the service’s documentation for vendor codes.
No. The short summaries are navigation aids, not complete protocol guidance. Method, headers, application behavior and the relevant specification determine handling. Copy and JSON exports include source and snapshot information so their limits remain visible.
