Sketchup License Portal Requires an IP Address (IPv4 or CIDR Block Format) -- Please indicate the type of IP Address below. Also, please know the following: The following IP address ranges are PRIVATE, and will not be recognized by the SketchUp licensing system. If you have an address that falls in any of these ranges, please contact your network admin to request your public address.10.0.0.0 - 10.255.255.255 (Class A private addresses)172.16.0.0 - 172.31.255.255 (Class B private addresses)192.168.0.0 - 192.168.255.255 (Class C private addresses) *