If you need to find machines that match a certain IP, here is a script to do so:

  
import-module activedirectory
  
$pc = get-adcomputer -filter *
  
$ip = read-host "What's the IP match? E.g. 10.15.201″
  
foreach ($x in $pc)
      
{
      
test-connection $x.DNSHOSTname -count 1 -ErrorAction SilentlyContinue | select @{N="Name";E={$x.DNSHostname}},IPV4Address | ? {$_.IPV4Address -like "\*$ip\*"}
      
}