Software & Windows Solutions - Subnet and IP Calculator One of the most important tools in the belt of a junior network engineer is an IP network calculator. These can be used
Tool to help you plan subnets in networks - DEV Community
WildPackets IP Subnet Calculator screenshot and download at SnapFiles.com
Subnet Calculator Sites for Network Admins
Subnet Calculator
networking - Is there a subnet calculator that computes the *complement* of a subnet? - Stack Overflow