Subnet Aggregation & Supernet

Paste a list of CIDR blocks and instantly merge overlapping or adjacent ranges into the minimal disjoint set, then get the single smallest supernet that contains them all — exactly the math routers do for route summarization. Inputs can be newline or comma separated.

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CIDRs (one per line, or comma separated)

All lines valid.

Input

Result

Reduction

1×

Supernet

0.0.0.0/0

The smallest single CIDR block containing all inputs.

Merged CIDRs · Overlapping and adjacent ranges combined into the minimal disjoint blocks.

10.0.0.0/23Hosts: 512

10.0.2.0/25Hosts: 128

192.168.1.0/24Hosts: 256

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