I know this is a little off topic but you guys are the best and i know
somebdoy out there will have the answer to my question :

I need to know how to find out all the domain names on the internet or if
thats not possible a method of determining
a domain name from any given ip address.

Using Visual Studio 2005, put two text boxes and one command button on a
form and use this code.  It will handle either a name or a numeric IP
address

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
        Windows.Forms.Cursor.Current = Cursors.WaitCursor
        'first determine if a numeric Ip address or a name
        Dim txtSearch As String = "", Result As String = ""
        If IsNumeric(Replace(Trim(Me.TextBox1.Text), ".", "")) Then
            txtSearch = Trim(Me.TextBox1.Text)
            Dim host As System.Net.IPHostEntry
            Try
                host = System.Net.Dns.GetHostEntry(txtSearch)
                Result = host.HostName.ToString
            Catch ex As Exception
                Windows.Forms.Cursor.Current = Cursors.Default
                MsgBox(ex.Message)
            End Try
        Else 'need to change the host name into a numeric IP address
            Dim host As System.Net.IPHostEntry
            Try
                host = System.Net.Dns.GetHostEntry(Trim(Me.TextBox1.Text))
            Catch ex As Exception
                Windows.Forms.Cursor.Current = Cursors.Default
                MsgBox(ex.Message)
                Exit Sub
            End Try

            Result = host.AddressList(0).ToString
        End If
        Me.TextBox2.Text = Result
        Windows.Forms.Cursor.Current = Cursors.Default
    End Sub


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