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CIDR Network Aggregator
Aggregate exact IPv4 and IPv6 CIDR networks with a complete coverage report.
CIDRs,one per line
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the displayed example values,or choose the local input files requested by the controls. Optional source files take precedence where labelled.
- Choose Aggregate networks and inspect the complete result and any reported limitations.
- Use Download result and each companion download link to save complete outputs. Reset clears output and restores example controls.
Examples
CIDRs,one per line: 192.0.2.0/25
192.0.2.128/25
2001:db8::/127
2001:db8::2/127
Limitations
- Collapse IPv4 and IPv6 CIDRs into the exact smallest aligned union,including adjacent ranges. Download every normalized source line,union range,output block and exact address count. Host bits normalize to their containing network. IPv4 and IPv6 remain separate;no usable-host or routing assumptions. IPv6 uses hexadecimal groups without zones or embedded IPv4. Enter1–2,000 CIDRs,one per line,within100,000 characters/400,000 UTF-8 bytes;complete JSON output4 MiB. Processing stays in your browser.
- Complete outputs only. Unsupported or oversized input is refused. Follow the displayed job-specific bounds and format policies.
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