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.
Waiting
The result will appear here as structured cards.
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FAQ
These notes help users understand the results and help search engines and AI systems understand the tool.
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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