Top level domain from URL in C#

You can use the following nuget Nager.PublicSuffix package. It uses the same data source that browser vendors use. nuget PM> Install-Package Nager.PublicSuffix Example var domainParser = new DomainParser(new WebTldRuleProvider()); var domainInfo = domainParser.Parse(“sub.test.co.uk”); //domainInfo.Domain = “test”; //domainInfo.Hostname = “sub.test.co.uk”; //domainInfo.RegistrableDomain = “test.co.uk”; //domainInfo.SubDomain = “sub”; //domainInfo.TLD = “co.uk”;