Final answer:
The HTTP Status Codes that indicate client errors are in the range of 400-416, with examples including 404 for 'Not Found' and 403 for 'Forbidden'.
Step-by-step explanation:
The range of HTTP Status Codes that reveals client error status is 400-416. This range is designated for client error responses, which indicate that there was a problem with the request made by the client. For example, the error code 404 signifies 'Not Found', meaning the requested resource could not be found on the server. A 403 error means 'Forbidden', revealing that the server understands the request but refuses to authorize it. Such responses help in diagnosing issues with HTTP requests made by clients.