CIDR Calculator

Calculate IPv4 and IPv6 subnets: network, broadcast, usable range, masks, and host counts.

IP address or CIDR block

Network address192.168.1.0

Broadcast address192.168.1.255

First usable host192.168.1.1

Last usable host192.168.1.254

Usable hosts254

Total addresses256

Subnet mask255.255.255.0

Wildcard mask0.0.0.255

CIDR prefix/24

IP classC

ScopePrivate (RFC 1918)

IP (binary)11000000.10101000.00000001.00000000

Mask (binary)11111111.11111111.11111111.00000000