Every time a task is run on a monitored device, the target server returns HTTP status codes to indicate the status of the response from the server.
These HTTP status codes, or network error codes, will appear in the results of a monitoring session as well as in alert notifications. These status codes are maintained by the Internet Assigned Numbers Authority (IANA) and the most current list of codes can be found here.
Using Filters you can remove results with specific status codes from your tasks, alerts, and reports. Click on the RFC reference documents in the list below for full details of the status codes.
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
Value  |
Description |
Reference |
|---|---|---|
| 100 | Continue | [RFC7231, Section 6.2.1] |
| 101 | Switching Protocols | [RFC7231, Section 6.2.2] |
| 102 | Processing | [RFC2518] |
| 103-199 | Unassigned | |
| 200 | OK | [RFC7231, Section 6.3.1] |
| 201 | Created | [RFC7231, Section 6.3.2] |
| 202 | Accepted | [RFC7231, Section 6.3.3] |
| 203 | Non-Authoritative Information | [RFC7231, Section 6.3.4] |
| 204 | No Content | [RFC7231, Section 6.3.5] |
| 205 | Reset Content | [RFC7231, Section 6.3.6] |
| 206 | Partial Content | [RFC7233, Section 4.1] |
| 207 | Multi-Status | [RFC4918] |
| 208 | Already Reported | [RFC5842] |
| 209-225 | Unassigned | |
| 226 | IM Used | [RFC3229] |
| 227-299 | Unassigned | |
| 300 | Multiple Choices | [RFC7231, Section 6.4.1] |
| 301 | Moved Permanently | [RFC7231, Section 6.4.2] |
| 302 | Found | [RFC7231, Section 6.4.3] |
| 303 | See Other | [RFC7231, Section 6.4.4] |
| 304 | Not Modified | [RFC7232, Section 4.1] |
| 305 | Use Proxy | [RFC7231, Section 6.4.5] |
| 306 | (Unused) | [RFC7231, Section 6.4.6] |
| 307 | Temporary Redirect | [RFC7231, Section 6.4.7] |
| 308 | Permanent Redirect | [RFC7238] |
| 309-399 | Unassigned | |
| 400 | Bad Request | [RFC7231, Section 6.5.1] |
| 401 | Unauthorized | [RFC7235, Section 3.1] |
| 402 | Payment Required | [RFC7231, Section 6.5.2] |
| 403 | Forbidden | [RFC7231, Section 6.5.3] |
| 404 | Not Found | [RFC7231, Section 6.5.4] |
| 405 | Method Not Allowed | [RFC7231, Section 6.5.5] |
| 406 | Not Acceptable | [RFC7231, Section 6.5.6] |
| 407 | Proxy Authentication Required | [RFC7235, Section 3.2] |
| 408 | Request Timeout | [RFC7231, Section 6.5.7] |
| 409 | Conflict | [RFC7231, Section 6.5.8] |
| 410 | Gone | [RFC7231, Section 6.5.9] |
| 411 | Length Required | [RFC7231, Section 6.5.10] |
| 412 | Precondition Failed | [RFC7232, Section 4.2] |
| 413 | Payload Too Large | [RFC7231, Section 6.5.11] |
| 414 | URI Too Long | [RFC7231, Section 6.5.12] |
| 415 | Unsupported Media Type | [RFC7231, Section 6.5.13] |
| 416 | Range Not Satisfiable | [RFC7233, Section 4.4] |
| 417 | Expectation Failed | [RFC7231, Section 6.5.14] |
| 418-421 | Unassigned | |
| 422 | Unprocessable Entity | [RFC4918] |
| 423 | Locked | [RFC4918] |
| 424 | Failed Dependency | [RFC4918] |
| 425 | Unassigned | |
| 426 | Upgrade Required | [RFC7231, Section 6.5.15] |
| 427 | Unassigned | |
| 428 | Precondition Required | [RFC6585] |
| 429 | Too Many Requests | [RFC6585] |
| 430 | Unassigned | |
| 431 | Request Header Fields Too Large | [RFC6585] |
| 432-499 | Unassigned | |
| 500 | Internal Server Error | [RFC7231, Section 6.6.1] |
| 501 | Not Implemented | [RFC7231, Section 6.6.2] |
| 502 | Bad Gateway | [RFC7231, Section 6.6.3] |
| 503 | Service Unavailable | [RFC7231, Section 6.6.4] |
| 504 | Gateway Timeout | [RFC7231, Section 6.6.5] |
| 505 | HTTP Version Not Supported | [RFC7231, Section 6.6.6] |
| 506 | Variant Also Negotiates | [RFC2295] |
| 507 | Insufficient Storage | [RFC4918] |
| 508 | Loop Detected | [RFC5842] |
| 509 | Unassigned | |
| 510 | Not Extended | [RFC2774] |
| 511 | Network Authentication Required | [RFC6585] |
| 512-599 | Unassigned |