IPv4 Calculator

IP and Subnet Mask or CIDR

Use IP & CIDR Subnet Mask:10.0.0.1/22
Or IP & Subnet Mask:10.0.0.1 255.255.252.0
Or IP & Wildcard Mask:10.0.0.1 0.0.3.255

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Javascript is the duct tape of the Internet.

By: Charlie Campbell.