I found a command-line program that did this once before, used it for a while and then forgot about it until right now and I'll be damned if I can find it again. A command line IP calculator that takes an address range and give it back in cidr format. I found an online one that does this here: http://www.ipaddresslocation.org/subnet-mask-calculator.php But I would prefer to have the commandline one back again. Does anyone know what it's called and where it can be found? -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com