CIDR / Subnet Calculator

Compute netmask, address range, broadcast, and host count for any IPv4 CIDR block.

IPv4 CIDR

Network address192.168.1.0

Broadcast address192.168.1.255

First usable host192.168.1.1

Last usable host192.168.1.254

Netmask255.255.255.0

Wildcard bits0.0.0.255

Prefix / bits/24

Total addresses256

Usable hosts254

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