Netmask Quick Reference. Online IP Subnet Calculator. Online IP Subnet Calculator. IP Subnet Calculator The IP Subnet Mask Calculator enables subnet network calculations using network class, IP address, subnet mask, subnet bits, mask bits, maximum required IP subnets and maximum required hosts per subnet.
Results of the subnet calculation provide the hexadecimal IP address, the wildcard mask, for use with ACL (Access Control Lists), subnet ID, broadcast address, the subnet address range for the resulting subnet network and a subnet bitmap. For classless supernetting, please use the CIDR Calculator. IP Calculator / IP Subnetting.