Subnet Calculator

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Calculate IPv4 and IPv6 subnets with network information

IP Address/Network:

Enter an IP address with optional CIDR notation for subnet calculation

Compare Subnet:

Enter another subnet to see if one contains the other

Shift subnet (new CIDR):

Enter a CIDR value to create subnets (higher number) or supernets (lower number)

Output format:

Calculate subnet information and determine if either subnet contains the other