IP Range Expander and Summarizer
How to Expand and Summarize IP Ranges Locally on your Mac
IP ranges are common in allowlists, firewall rules and network cleanup. CodeSwissKnife expands, summarizes and normalizes IPv4 and IPv6 ranges locally.
Why process IP ranges locally?
Range lists can describe private infrastructure. Local processing keeps those addresses on your Mac.
Summarize with CIDR blocks
The summarizer merges adjacent and overlapping ranges, then covers each set with the fewest CIDR blocks without claiming more or fewer addresses than the input.
Expand realistic workloads
Expansion is capped for interactive use, while large reports use preview limits so Copy and Save can still keep complete output.
Use IP Range Expander and Summarizer on macOS
Download CodeSwissKnife to keep this network workflow and the rest of your developer tools in one native Mac app.