How to Use the CIDR to IP Range & IP Aggregator
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1
Mode A: Enter a CIDR notation (e.g. 192.168.10.0/23) to see exact Start IP, End IP, and total IPs.
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Mode B: Enter a Start IP (e.g. 10.0.0.1) and End IP (e.g. 10.0.3.254) to calculate the minimal enclosing CIDR blocks.
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Inspect the subnet aggregation summary.
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Export the IP range in standard CIDR, hyphenated, or firewall format.
Practical Example & Use Case
Common Real-World Scenario
Finding that the IP range 192.168.0.0 to 192.168.1.255 can be summarized by the single CIDR block 192.168.0.0/23.
Technical Notes & Limitations
Browser Engine Architecture
Operates on standard 32-bit IPv4 address ranges.
Frequently Asked Questions
What is CIDR aggregation / summarization?
It is the process of combining multiple continuous IP network addresses into a single routing prefix to reduce routing table size.