IIS · December 18, 2023

IIS Status Code - 416 Range Not Satisfiable

IIS Status Code - 416 Range Not Satisfiable

When browsing the internet, you may have encountered various error messages that indicate a problem with the website or server you are trying to access. One such error is the IIS status code 416, also known as "Range Not Satisfiable." In this article, we will explore what this error means, its causes, and possible solutions.

Understanding the IIS Status Code 416

The IIS status code 416 is an HTTP response status code that indicates the server cannot fulfill the request because the requested range is invalid or outside the boundaries of the available resource. This error typically occurs when a client sends a "Range" header in the request, specifying a range of bytes it wants to retrieve from the server.

For example, if a client requests to download a large file and specifies a range of bytes that is beyond the size of the file, the server will respond with the 416 error code. This error is often seen when downloading videos, audio files, or other large media files.

Possible Causes of the 416 Error

There are several reasons why you might encounter the IIS status code 416:

  • Invalid Range Request: The client may send an invalid range request, such as specifying a range that is outside the size of the requested resource.
  • Unsupported Range Requests: The server may not support range requests for the requested resource. Some servers or websites may disable range requests to prevent partial content downloads.
  • Network Issues: Network connectivity problems or interruptions during the file transfer process can also lead to the 416 error.

Resolving the 416 Error

If you encounter the IIS status code 416, there are a few steps you can take to resolve the issue:

  • Retry the Request: Sometimes, the error may be temporary, and retrying the request after a few moments can resolve the issue.
  • Check Network Connectivity: Ensure that your internet connection is stable and not experiencing any interruptions. You can try accessing the website or resource from a different network to rule out any local network issues.
  • Disable Range Requests: If you are the website owner or administrator, you can disable range requests for the specific resource causing the error. However, this may affect the ability to download large files in chunks.

Summary

The IIS status code 416, or "Range Not Satisfiable," occurs when a client sends a request with an invalid or out-of-range "Range" header. This error can be caused by invalid range requests, unsupported range requests, or network issues. To resolve the issue, you can retry the request, check network connectivity, or disable range requests if you have administrative access to the server.

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