Great App for planning out subnets when planning your network
iPhone version:
https://itunes.apple.com/us/app/ipv4...7290?ls=1&mt=8&at=10l3Vy
iPad version:
https://itunes.apple.com/us/app/ipv4...8943?ls=1&mt=8&at=10l3Vy
iPhone version:
https://itunes.apple.com/us/app/ipv4...7290?ls=1&mt=8&at=10l3Vy
iPad version:
https://itunes.apple.com/us/app/ipv4...8943?ls=1&mt=8&at=10l3Vy