What variable type would i assign a user entered ip address in vb?

Module Module1
    Sub Main()
        Dim pingCounter As Integer = 0
        pingCounter = generateRandom(pingCounter)
        Console.WriteLine("The server was pinged " & pingCounter & " time(s).")
        Console.WriteLine("Press Any key to exit...")
        Console.ReadKey()
    End Sub
End Module
Module RNG
    Function generateRandom(ByRef pingCounter As Integer) As Integer
        Dim RN As Integer = 0
        Dim Count As Integer = 0
        For Count = 1 To 200
            RN = Int(Rnd() * 20 + 1)
            If RN <> 5 Then
                Console.WriteLine("Random number was " & RN & " this was not the target number.")
                Console.WriteLine("Re-rolling in 1000 ms...")
            ElseIf RN = 5 Then
                pingMe()
                pingCounter = pingCounter + 1
            End If
            System.Threading.Thread.Sleep(1000)
        Next
        Return pingCounter
    End Function
End Module
Module Ping
    Sub pingMe()
        Shell("Ping.exe 127.0.0.1", , True)
        Console.Out.WriteLine(" ")
    End Sub
End Module