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CIDR / Subnet Calculator

Compute network, broadcast, mask, and host range for an IPv4 CIDR block.

192.168.1.0/24
10.0.0.0/8
172.16.5.4/20
203.0.113.0/30

Network address

192.168.1.0

Broadcast address

192.168.1.255

Netmask

255.255.255.0

Wildcard mask

0.0.0.255

First host

192.168.1.1

Last host

192.168.1.254

Usable hosts

254

Total addresses

256