IPv4 Subnet Calculator

Enter an IP and CIDR prefix to get the network, broadcast, mask, host range and host count.

IP address / CIDR

Network address192.168.1.0

Broadcast address192.168.1.255

Subnet mask255.255.255.0

Wildcard mask0.0.0.255

First host192.168.1.1

Last host192.168.1.254

Usable hosts254

Total addresses256

Enter an IPv4 address with a CIDR prefix (e.g. 10.0.0.0/8). A /31 is treated as a point-to-point link (RFC 3021) and /32 as a single host. Runs locally.