How to ping IP Address in asp.net Using vb.net fastly ?

Hai 
  How to ping ip address in asp.net using vb.net,i have more than 20 ip address it load in grid view,if ip address is ping it show connected icon in grid view and if not it show disconnected icon.I have done but pining time is too slow if more than 20 ip address,here i put code for change the image icon based on pining address.

 Protected Sub gvDevice_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles gvDevice.RowDataBound
        If (e.Row.RowType = DataControlRowType.DataRow) Then

            Dim imgStatuss As Image = e.Row.FindControl("imgStatus")

            Dim status As String = DataBinder.Eval(e.Row.DataItem, "IPAddress")

            Dim ping As Ping = New Ping()
            Dim pingreply As PingReply = ping.Send(status)'---->status is IP Address
            Dim reply As String = pingreply.Status

            If (reply = 0) Then'---> if reply is 0 it can ping,if other than 0 can not ping ip address
                imgStatuss.ImageUrl = "~/images/icon_Status-Connected.png"
            Else
                imgStatuss.ImageUrl = "~/images/icon_Status-Disconnected.png"
            End If
        End If
    End Sub

The above code is works well,but it take long time to load in gridview,pls reply how ping fastly and load in gridview.

Regards 
   Aravind