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Subnet Calculator

Calculate network address, broadcast address, usable hosts, and subnet mask from an IP and CIDR.

Network Address192.168.1.0
Broadcast Address192.168.1.255
First Host192.168.1.1
Last Host192.168.1.254
Subnet Mask255.255.255.0
Usable Hosts254
IP ClassC
How this is calculated

Subnet mask = 32-bit mask from CIDR prefix. Network = IP AND mask. Broadcast = Network OR ~mask. Usable = 2^(32−prefix) − 2.

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