On 28/01/2010, at 11:48 AM, craig at askings.com.au wrote: > I use another utilty called sipcalc for my ipv6 subnetting, > not sure if there is a cgi wrapper for it though. sipcalc and ipv6gen (http://techie.devnull.cz/ipv6/ipv6gen/) utilities are handy if you have access to a *nix machine. Tom