Subnet Calculator

Calculate subnet masks, wildcard masks and host counts for IPv4 networks.

Compute the netmask, wildcard mask, network and broadcast addresses, and the number of usable host addresses for any IPv4 subnet.

Related tools

CIDR CalculatorCompute network, broadcast, range and host count for any CIDR block.CIDR to IP RangeConvert a CIDR block to its start and end IP addresses.

Frequently asked questions

How many usable hosts are in a /22?

2^(32-22) - 2 = 1022 usable addresses, after reserving network and broadcast.