Whatmask

Whatmask is a compact program that helps with network configuration. With only a subnet mask as an argument, it returns the subnet mask in four different formats and the count of usable addresses within the range. Or, given an IP address within the subnet plus the subnet mask in any format, it prompts Whatmask to provide CIDR, Netmask, Network Address, Broadcast Address, Usable IP Address count, and First and Last Usable IP Address. Kindly suggested by WhereasHot310.