Hello i know these are most common error codes that 1 can see when dealing with websites, and these are most common terms with related to webpages and the URL.
301 Moved Permanently: This and all future requests should be directed to the given URI.
302 Found: Moved Temporarily: This is an example of industry practice contradicting the standard.
403 Forbidden: The request was a valid request, but the server is refusing to respond to it.
404 Not Found: The requested resource could not be found but may be available again in the future.
I too my self got this information from Wikipedia and for more list of these types of errors, you can go through the above give link.