Server URLs (or Uniform Resource Locators) are the names that we typically think of when we think about a server (www.ehow.com, for example). These URLs are actually translated into server IP addresses when we navigate to a web page, because each URL is assigned to an IP address. Thus, if you know the IP address of the server, you can find out the URL with a simple command.
Click on the "Start" button and click on "Run" (Windows XP) or click on the Search Bar (Windows Vista or Windows 7).
Type "cmd" into the box and hit the "Enter" key (all versions of Windows).
Type "ping -a 123.456.789.123" into the command prompt, substituting the IP address of the server you are looking up for "123.456.789.123" (all versions of Windows).
Read the server URL from the response given in the command prompt window.