Extract domain name from URL in C#

c# url dns extract whois
Xaqron picture Xaqron · Nov 8, 2010 · Viewed 7.6k times · Source

This question has answer in other languages/platforms but I couldn't find a robust solution in C#. Here I'm looking for the part of URL which we use in WHOIS so I'm not interested in sub-domains, port, schema, etc.

Example 1: http://s1.website.co.uk/folder/querystring?key=value => website.co.uk
Example 2: ftp://username:[email protected] => website.com

The result should be the same when the owner in whois is the same so sub1.xyz.com and sub2.xyz.com both belong to who has the xyz.com which I'm need to extract from a URL.

Answer

servermanfail picture servermanfail · Feb 13, 2011

I needed the same, so I wrote a class that you can copy and paste into your solution. It uses a hard coded string array of tld's. http://pastebin.com/raw.php?i=VY3DCNhp

Console.WriteLine(GetDomain.GetDomainFromUrl("http://www.beta.microsoft.com/path/page.htm"));

outputs microsoft.com

and

Console.WriteLine(GetDomain.GetDomainFromUrl("http://www.beta.microsoft.co.uk/path/page.htm"));

outputs microsoft.co.uk

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