IP Range Calculator
Calculate total address counts, optimal CIDR block allocations, and boundary specifications between any start and end IPv4 address range.
Calculating range metrics...
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IP Range Reference
1. Range to CIDR Aggregation
Arbitrary IP ranges do not always fit neatly into a single subnet. The calculator splits the range into the minimal set of valid CIDR blocks required to cover all addresses.
2. Network Firewall Rules
Firewall access control lists (ACLs) and security groups frequently require precise CIDR notation breakdowns to permit or deny specific client IP ranges.
How to use IP Range Calculator
- Enter or paste the values requested in the input fields.
- Choose any options provided, then run an action button if the tool requires one.
- Review the result and copy or adjust it as needed.
IP Range Calculator features
- Available tool controls: Calculate Range.
- Input and option fields: Start IP Address:, End IP Address:, Range Properties & Statistics:.
Frequently Asked Questions (FAQ)
It translates start and end IP address boundaries into exact address counts and optimized CIDR blocks, useful for network planning and routing configurations.
Subnets must align with power-of-2 boundaries. If your start and end range does not align with a single binary boundary, it is automatically aggregated into the fewest possible CIDR blocks.
Yes. All network range computations and aggregations run completely client-side in your browser instance.