Public Sub isRTL(number As String) As Boolean
Dim areacodes() As String = Regex.Split(",", "967,973,98,964,972,962,965,961,968,92,970,974,966,963,971,20,216,212,213,218,222,249,211,252")
For Each areacode As String In areacodes
If number.StartsWith(areacode) Then Return True
Next
Return False
End Sub