Network

Supernet Calculator

Find the smallest covering CIDR for an IPv4 start/end range.

Supernet Calculator finds the minimal supernet that covers multiple child networks. It is useful for summarizing routes and simplifying security policy definitions. The tool helps you collapse complexity while preserving address inclusion requirements. Use it when optimizing route advertisements or ACL entries.

Supernet Inputs

Result

Covering supernet: 10.0.0.0/22

Range size: 1,024 IPs

How to use this tool

Provide the list of subnets you want to cover.
Run the tool to compute the smallest enclosing supernet.
Validate that resulting coverage is acceptable for your policy scope.

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