Subnet Calculator

Calculate IP subnets.

IPv4 address

CIDR prefix

Network192.168.1.0

Broadcast192.168.1.255

Subnet mask255.255.255.0

Wildcard0.0.0.255

Total addresses256

Usable hosts254

First usable192.168.1.1

Last usable192.168.1.254

ℹ️ /31 treats both addresses as usable for point-to-point links, and /32 represents one host address.

ℹ️ Subnet Calculator

Calculate IP subnets.

Verify results with an authoritative source before using them for important medical, legal, or financial decisions.