IP Range Calculator

Calculate the full IP address range for a given subnet or CIDR block, showing start, end and total count.

Enter CIDR (e.g. 10.0.0.0/24) or a range (e.g. 10.0.0.1 - 10.0.0.50)

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Frequently asked questions

How is the IP range calculated?
The first address in the range is the network address (all host bits = 0) and the last is the broadcast address (all host bits = 1). Usable host addresses exclude these two endpoints.