Clean interface and user friendly Nice work done here and recommended as well. Just a point to note that it's a bit of work to select the numbers in the iP address section. It does not highlight unless you are very precisely touching the numbers. But this is just me as a user. Kind of inconvenience. But does what it's developed for. Recommended.
This version allows the user to create IPv4 and IPv6 subnets from a network prefix.