Online web IPv4 and IPv6 IP subnet Calculator

Use this tool to calculate your IP addresses before you apply them to interfaces! It is an IPv6 calculator too!


Subnet: (e.g. 10.0.0.5/24 or 3ffe:3f1a:21::/126)



Please enter a valid IPv4 or IPv6 subnet address in the above form. (Include /subnetlength in the end.)