IP Range Calculator
Determine IP address ranges from start and end IPs
What is an IP Range Calculator?
An IP Range Calculator determines the total number of IP addresses between a start and end IP address. This is essential for network planning, firewall rule creation, and understanding address space allocation.
Enter any valid IPv4 start and end addresses to instantly calculate the range size, binary representations, and hexadecimal equivalents.
How to Use This Tool
- Enter Start IP — The first IP address in your range.
- Enter End IP — The last IP address in your range.
- Click Calculate — View the total count and format conversions.
How to Use This Tool
- Enter your input — Provide the value required by IP Range Calculator (e.g., IP, domain, text) in the input field above.
- Configure options — Adjust any settings such as CIDR, key length, or format if the tool provides them.
- Click Calculate/Generate — Results appear instantly in the results panel below.
- Copy or export — Use Copy All or Download (CSV/PDF) to save results. All processing stays in your browser.
Understanding the Results
Output format: Determine IP address ranges from start and end IPs. Results are shown with clear labels and can be copied for documentation, ticketing, or IPAM systems.
Accuracy: Calculations follow current RFCs and browser-native crypto where applicable. For DNS/WHOIS lookups, results reflect live network responses at query time.
Tips & Best Practices
• Keep inputs in correct format (e.g., valid IPv4 like 192.168.1.1, valid domain like example.com) to avoid validation errors.
• Bookmark this tool and try related tools: IP Tools utilities are linked below as Related Tools.
• All NETCUE tools run client-side — no data leaves your browser. For sensitive data, you can use them offline after first load.
Frequently Asked Questions
No, the start IP must be numerically less than or equal to the end IP. The tool validates this and returns 0 if the range is invalid.
IP range calculations are used for firewall rules, DHCP scope planning, network documentation, and verifying address allocation efficiency.
Yes — every NETCUE tool, including IP Range Calculator, is free, requires no login, and runs entirely in your browser. No input is sent to any server.
No. IP Range Calculator processes everything locally via JavaScript. Closing the tab clears the in-memory input. We do not log, store or transmit your data.
Determine IP address ranges from start and end IPs — built for network engineers and developers, with instant results, copy/export, and related ip tools tools one click away.
Yes. After the page loads once, it works offline (service worker cache) and is fully responsive on mobile. Inputs stay 16px to avoid iOS zoom.
Sized this for your site?
Free engineers turn these numbers into a working design — topology, hardware and quote included.