IPv6 Subnet Calculator
Compute network, range, and total addresses of an IPv6 subnet. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
2001:db8::/32
Example Output
2001:db8:: … range, 2^96 addresses
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the IPv6 Subnet Calculator
The IPv6 Subnet Calculator breaks down an IPv6 block from an address and prefix: the (compressed) network address, range start & end, and total addresses (which can be enormous — computed with BigInt). It supports compressed "::" notation.
Useful for planning modern IPv6 networks.
FAQ
Is this IPv6 Subnet Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.