Merge adjacent IPv4 CIDR blocks
Reduce allowlist or firewall ranges into a shorter aggregated CIDR list.
Open exampleCIDR aggregation checker
Merge IPv4 CIDR ranges into the smallest equivalent CIDR list for network whitelist cleanup.
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The result will appear here as structured cards.
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FAQ
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What does CIDR aggregation checker do?
It helps you inspect or process this value and get a readable result quickly.
Is my input saved?
Local tools run in the browser when possible. Server-side checks only use the input needed to complete the lookup.
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