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CIDR to IP Range

Convert a CIDR block to its start and end IP addresses.

Every CIDR block represents a contiguous range of IP addresses. This tool shows the first and last address in the range, plus the number of addresses it contains.

Related tools

CIDR CalculatorCompute network, broadcast, range and host count for any CIDR block.IP Range to CIDRFind the minimal CIDR blocks that exactly cover an IP range.

Frequently asked questions

Does a /24 always have 256 addresses?

Yes for IPv4. A /24 is 2^(32-24) = 256 addresses, of which 254 are usually usable as hosts.