IPCALCULATOR / INFORMATION

Useful Numbers. Visible Assumptions.

IPCALCULATOR helps people understand address space before they use it.

Practical Tools and Field Knowledge

Calculate IPv4 and IPv6 networks, visualize the prefix boundary, inspect exact counts and representations, and split a parent into equal child blocks. The field guide explains the limits of the arithmetic and the checks that belong in a real deployment.

Independent and Accessible

This site is part of our independently operated internet-utility network. No account or ad click is required to use the calculator. We are not an IP registry, ISP, certification authority, or network-administration service.

Tell Us What Needs Improving

For a calculation issue, a small documentation-range example, your expected result, and your browser version are more useful than a private production plan. We welcome corrections backed by primary technical references.

Questions, corrections, privacy requests, or advertising enquiries: [email protected]. Please do not send passwords, credentials, customer records, or a complete production address plan.