IPv6 Subnet Calculator
IPv6 CIDR to network range and hosts.
| Address | 2001:db8::/32 | |
| Full address | 2001:0db8:0000:0000:0000:0000:0000:0000 | |
| Network | 2001:db8::/32 | |
| First | 2001:db8:: | |
| Last | 2001:db8:ffff:ffff:ffff:ffff:ffff:ffff | |
| Total addresses | 2^96 (≈ 79228.0 × 10²⁴) | |
| Prefix length | 32 |
IPv6 subnet calculation using BigInt math — handles the full 128-bit address space. All computation runs in your browser.
About this tool
Compute IPv6 network and first/last addresses from any CIDR notation using BigInt math — handles the full 128-bit address space entirely in your browser.
It runs completely in your browser — no input is sent anywhere, and this page loads no ads or third-party scripts, so it is safe to use with data you would not paste into a hosted service.