Network address, broadcast, host range, subnet mask — instantly.
The IP/CIDR Calculator computes all subnet parameters: network address, broadcast address, host range, subnet mask, and wildcard mask. Supports CIDR notation (192.168.1.0/24) and dotted-decimal mask (192.168.1.0/255.255.255.0). All calculations happen in your browser.
CIDR (Classless Inter-Domain Routing) is a notation for specifying subnets, e.g. 192.168.1.0/24. The number after / is the mask length.
Enter IP and subnet mask — the calculator shows network, broadcast, host range, and number of available addresses.