~ $ devkit:cidr-calc

CIDR Calculator

Compute the network, broadcast and usable host range for any IPv4 CIDR block.

Network

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Broadcast

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Subnet mask

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Wildcard mask

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First usable host

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Last usable host

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Usable hosts

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Total addresses

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How to use CIDR Calculator

Enter an IPv4 address and prefix length, such as 192.168.1.10/24.
Choose Calculate to see the network, mask, broadcast and usable address range.

Example

Input: 192.168.1.10/24
Network: 192.168.1.0
Broadcast: 192.168.1.255
Usable hosts: 254

Details and limitations

IPv4 only, with prefix lengths from 0 through 32. /31 uses the two-address point-to-point convention, and /32 represents a single host. Actual address usability also depends on network configuration.