Easy calculators for subnetting, CIDR, and VLSM.
Work out the network address, broadcast address, and usable host range.
Network, range and subnets for any IPv6 prefix, plus compress and expand.
Switch between CIDR notation and subnet masks.
Plan different-sized subnets across one network.
Turn a subnet mask into its wildcard mask.
Unlimited subnetting drills with worked solutions.