I'm sorry, maybe I didn't understand well what you mean. And maybe you wont understand me because my English it's kind a weird English

Are you trying to ping two or more ip's at the same time? You will have to use threads or some trick to do it at the same time.
Or maybe you're saying that when you do a ping from the last ip and try to ping the first ip (for example) the result it's exactly equal than the result of the last ip. That's because you're getting the wrong item.

It's late here, maybe i didn't understand you

Farewell

:O Ahh.... now i know what you mean.

How do you "ping" ? using ping command? using a socket module ?

If you're using ping command from batch, you must do a (i thinks it calls..) pipe between cmd and your app. To filter de line and refresh the value in the listview. To an infinite ping you must do "ping (ip) -t" and send Control + C to terminate it

Otherwise, it depends on what are you using. If you don't have a module and you don't use ping command. You should search about ICMP paquets (ping protocol)