Hi all, I'm writing an application which has to trasform a IP range to CIDR format. For example: 212.141.198.0 - 212.141.255.255 can be rappresented as 212.141.198.0/23 212.141.200.0/21 212.141.208.0/20 212.141.224.0/19 In my opinion I coulb use apr: is it true? Which function could I use? Thanks marco