Dim $txt, $error = False, $i = 1
Dim $handle = FileOpen("ip.txt")
Do
$txt = FileReadLine($handle, $i)
If @error Then $error = True
$txt = StringRegExp($txt, "\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}", 3)
If Not @error Then
For $x = 0 To UBound($txt) - 1
If StringInStr($txt[$x], "173.25.") Then MsgBox(0, "", $txt[$x])
Next
EndIf
$i = $i + 1
Until $error = True