IP Range to CIDR Converter
Network & Ops · Free Online Tool
Convert start/end IP to CIDR list.
- 192.168.0.0/24
Minimal Blocks
Produces the smallest set of CIDR blocks that exactly covers the range.
Handles Any Range
Works with arbitrary IP ranges — not limited to power-of-two boundaries.
Copy All
Copy the entire CIDR list at once for use in firewalls or routing configs.
How to Use IP Range to CIDR Converter
- 1Enter the URL, IP address, or network parameter to look up.
- 2Click the lookup or test button.
- 3Review the detailed results in the output panel.
- 4Use the information for your network operations.
Features
- ✓100% free — no signup, no subscription, no ads
- ✓Runs entirely in your browser — data never leaves your device
- ✓Fast and lightweight — instant results
- ✓Cross-platform — works on desktop, tablet, and mobile
Frequently Asked Questions
Are network lookups real-time?
Yes, IP lookups, DNS queries, and HTTP tests perform live network requests to provide current data.
Is my IP address logged?
The IP Lookup tool queries public geolocation APIs. We do not store your IP address or lookup history.
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Learn the concept
Learn the concept
Understand the programming ideas behind this tool.