# Hypertext Transfer Protocol (HTTP) Status Code Registry

- Last Updated
- 2024-11-13
- Available Formats
-

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**Registry included below**

## HTTP Status Codes

- Registration Procedure(s)
-
IETF Review

- Reference
- [RFC9110, Section 16.2.1]
- Note
-
1xx: Informational - Request received, continuing process 2xx: Success - The action was successfully received, understood, and accepted 3xx: Redirection - Further action must 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 fulfill an apparently valid request

- Available Formats
-

CSV

Value | Description | Reference |
---|---|---|

100 | Continue | [RFC9110, Section 15.2.1] |

101 | Switching Protocols | [RFC9110, Section 15.2.2] |

102 | Processing | [RFC2518] |

103 | Early Hints | [RFC8297] |

104 | Upload Resumption Supported (TEMPORARY - registered 2024-11-13, expires 2025-11-13) | [draft-ietf-httpbis-resumable-upload-05] |

105-199 | Unassigned | |

200 | OK | [RFC9110, Section 15.3.1] |

201 | Created | [RFC9110, Section 15.3.2] |

202 | Accepted | [RFC9110, Section 15.3.3] |

203 | Non-Authoritative Information | [RFC9110, Section 15.3.4] |

204 | No Content | [RFC9110, Section 15.3.5] |

205 | Reset Content | [RFC9110, Section 15.3.6] |

206 | Partial Content | [RFC9110, Section 15.3.7] |

207 | Multi-Status | [RFC4918] |

208 | Already Reported | [RFC5842] |

209-225 | Unassigned | |

226 | IM Used | [RFC3229] |

227-299 | Unassigned | |

300 | Multiple Choices | [RFC9110, Section 15.4.1] |

301 | Moved Permanently | [RFC9110, Section 15.4.2] |

302 | Found | [RFC9110, Section 15.4.3] |

303 | See Other | [RFC9110, Section 15.4.4] |

304 | Not Modified | [RFC9110, Section 15.4.5] |

305 | Use Proxy | [RFC9110, Section 15.4.6] |

306 | (Unused) | [RFC9110, Section 15.4.7] |

307 | Temporary Redirect | [RFC9110, Section 15.4.8] |

308 | Permanent Redirect | [RFC9110, Section 15.4.9] |

309-399 | Unassigned | |

400 | Bad Request | [RFC9110, Section 15.5.1] |

401 | Unauthorized | [RFC9110, Section 15.5.2] |

402 | Payment Required | [RFC9110, Section 15.5.3] |

403 | Forbidden | [RFC9110, Section 15.5.4] |

404 | Not Found | [RFC9110, Section 15.5.5] |

405 | Method Not Allowed | [RFC9110, Section 15.5.6] |

406 | Not Acceptable | [RFC9110, Section 15.5.7] |

407 | Proxy Authentication Required | [RFC9110, Section 15.5.8] |

408 | Request Timeout | [RFC9110, Section 15.5.9] |

409 | Conflict | [RFC9110, Section 15.5.10] |

410 | Gone | [RFC9110, Section 15.5.11] |

411 | Length Required | [RFC9110, Section 15.5.12] |

412 | Precondition Failed | [RFC9110, Section 15.5.13] |

413 | Content Too Large | [RFC9110, Section 15.5.14] |

414 | URI Too Long | [RFC9110, Section 15.5.15] |

415 | Unsupported Media Type | [RFC9110, Section 15.5.16] |

416 | Range Not Satisfiable | [RFC9110, Section 15.5.17] |

417 | Expectation Failed | [RFC9110, Section 15.5.18] |

418 | (Unused) | [RFC9110, Section 15.5.19] |

419-420 | Unassigned | |

421 | Misdirected Request | [RFC9110, Section 15.5.20] |

422 | Unprocessable Content | [RFC9110, Section 15.5.21] |

423 | Locked | [RFC4918] |

424 | Failed Dependency | [RFC4918] |

425 | Too Early | [RFC8470] |

426 | Upgrade Required | [RFC9110, Section 15.5.22] |

427 | Unassigned | |

428 | Precondition Required | [RFC6585] |

429 | Too Many Requests | [RFC6585] |

430 | Unassigned | |

431 | Request Header Fields Too Large | [RFC6585] |

432-450 | Unassigned | |

451 | Unavailable For Legal Reasons | [RFC7725] |

452-499 | Unassigned | |

500 | Internal Server Error | [RFC9110, Section 15.6.1] |

501 | Not Implemented | [RFC9110, Section 15.6.2] |

502 | Bad Gateway | [RFC9110, Section 15.6.3] |

503 | Service Unavailable | [RFC9110, Section 15.6.4] |

504 | Gateway Timeout | [RFC9110, Section 15.6.5] |

505 | HTTP Version Not Supported | [RFC9110, Section 15.6.6] |

506 | Variant Also Negotiates | [RFC2295] |

507 | Insufficient Storage | [RFC4918] |

508 | Loop Detected | [RFC5842] |

509 | Unassigned | |

510 | Not Extended (OBSOLETED) | [RFC2774][Status change of HTTP experiments to Historic] |

511 | Network Authentication Required | [RFC6585] |

512-599 | Unassigned |