INGENIXTOOLS FOR A CONNECTED WORLD
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ADDRESSING

IP / CIDR Converter

Convert between IPv4 CIDR prefixes and dotted-decimal subnet masks, with the corresponding wildcard mask and host capacity.

Enter a prefix such as /24 or a subnet mask such as 255.255.255.0.

Wildcard masks

A wildcard mask is the inverse of a subnet mask and is commonly used in network ACLs. For example, 255.255.255.0 becomes 0.0.0.255.