How to Use This Tool
This converter helps you convert a range of IP addresses into minimal CIDR notation blocks that cover the entire range.
- Enter the starting and ending IP address (IPv4 or IPv6).
- Click “Convert to CIDR” to calculate the optimal CIDR blocks.
- The result will show one or more CIDR notations covering the full range.
- You can download the list as a PDF for documentation or sharing.
Note: IPv6 support is experimental in this version. Ensure correct formatting (e.g., ::1).
About This Tool
This tool simplifies the process of converting arbitrary IP ranges into standard CIDR notation used in networking, cloud environments, firewalls, and access control lists.
It's particularly useful when managing large subnets or generating IP whitelists/blacklists.
