It depends on what program you're trying to feed the IP to. Some don't support CIDR. Make sure that whatever you're using the IP for has proper support for it. Eden From: "Mike Starke" > I used the term "smack dab" as a figure of speech. I have tried > the format 1.2.3.4/27 but it failed. 255.255.255.224 is my mask, > I have tried 1.2.3.4/255.255.255.224 and the above with no sucess. > Am I missing something here?