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IP Subnet Calculator

Calculate IPv4 network, broadcast, subnet mask, and host range from a CIDR prefix.

/CIDR
Network address
192.168.1.0
192.168.1.34/24
Subnet mask255.255.255.0
Wildcard mask0.0.0.255
Broadcast address192.168.1.255
First usable address192.168.1.1
Last usable address192.168.1.254
Total addresses256
Usable host addresses254

About the IP Subnet Calculator

Calculate IPv4 network, broadcast, subnet mask, and host range from a CIDR prefix.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

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