IP Subnet Calc Pro

Calculate IPv4 and IPv6 subnets with this easy subnetting tool. Get the number of hosts, first and last network addresses of your network and many other details.

This subnet calculator converts both IPv4 and IPv6 addresses and displays useful information about your subnets like number of hosts, subnet size, class, subnet mask, wildcard, network address, first address, last address and broadcast address. Take the CIDR slider and watch the subnet properties change accordingly to the IP address.