CIDR Subnet Calculator

Calculate network, broadcast, host range, netmask, and wildcard for any IPv4 CIDR block. Free, private, runs in your browser.

CIDR block

Network address

192.168.1.0

Broadcast address

192.168.1.255

First host

192.168.1.1

Last host

192.168.1.254

Netmask

255.255.255.0

Wildcard mask

0.0.0.255

Prefix length

/24

Total addresses

256

Usable hosts

254