Subnetting workflow depth

v10.81 connects IPv4/IPv6 inspection, exact range-to-CIDR conversion, VLSM allocation, fixed-size splitting, route aggregation, binary/reference views, and practice. Deterministic address math stays local in the browser, with copy/export where it helps real network planning.

How to use this Supernet Calculator

Aggregate IPv4 addresses and CIDR blocks into minimal exact routes and a single covering supernet.

Enter, paste, upload, or choose the inputs shown in the tool above.
Adjust the available options for the result you need.
Review the output before copying, downloading, or using it elsewhere.

What this tool does

Paste IPv4 addresses or networks to compare exact CIDR aggregation with the smallest one-route covering supernet and its extra address space.

Practical tips and limits

Review the inputs and result before using the output elsewhere. Keep the original data when the operation changes or replaces content.