Find IP address and location of FTP sites

Here is the code with which you can play and explore the internet:

string srv = null;

do
{

    Console.Write("Enter server name: ");
    srv = Console.ReadLine();

    if (!string.IsNullOrEmpty(srv))
    {
        try
        {
            System.Net.IPAddress[] addr = System.Net.Dns.GetHostAddresses(srv);
            for (int i = 0; i < addr.Length; i++)
                Console.WriteLine("Name: {0}; Family: {1}; Address: {2}", srv, addr[i].AddressFamily, addr[i].ToString());
        }
        catch (System.Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
}
while (!string.IsNullOrEmpty(srv));

I've tried several addresses and results are interesting:
Name: www.microsoft.com; Family: InterNetwork; Address: 207.46.131.43
Name: ftp.microsoft.com; Family: InterNetwork; Address: 64.4.30.34
Name: ftp.c-sharpcorner.com; Family: InterNetwork; Address: 74.81.194.29
Name: www.c-sharpcorner.com; Family: InterNetwork; Address: 74.81.194.29
Name: www.sysexpand.com; Family: InterNetwork; Address: 66.96.146.89
Name: ftp.sysexpand.com; Family: InterNetwork; Address: 66.96.146.89
Name: www.oracle.com; Family: InterNetwork; Address: 46.33.68.118
Name: www.oracle.com; Family: InterNetwork; Address: 46.33.68.78
Name: ftp.oracle.com; Family: InterNetwork; Address: 141.146.44.21

You can see that large systems, like microsoft.com and oracle.com, hold FTP on different addresses. However, smaller sites, typically hosted for money at the ISP, have same address of FTP and HTTP server. That is typical situation on the Internet and it is directed by actual traffic made over FTP and HTTP.

Zoran