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SUMMARY
Internet Explorer has a maximum uniform resource locator (URL) length of 2,083 characters, with a maximum path length of 2,048 characters. This limit applies to both POST and GET request URLs.
If you are using the GET method, you are limited to a maximum of 2,048 characters (minus the number of characters in the actual path, of course).
POST, however, is not limited by the size of the URL for submitting name/value pairs, because they are transferred in the header and not the URL.
RFC 2616, Hypertext Transfer Protocol -- HTTP/1.1, does not specify any requirement for URL length.