Supernet Calculator

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

IPv4 addresses or CIDR blocks

—Single covering supernet

—Exact CIDR routes

—Addresses represented

—Extra addresses in one-route cover

ReadyExact aggregation never needs to include addresses outside your supplied intervals; a single covering supernet sometimes does.