For IPv4 calculations, use the IPv4 Subnet Mask Calculator.
Enter an IPv6 address and select a prefix length from the dropdown to calculate the network address, expanded form, address type, and more. Unlike IPv4, IPv6 has no dotted-decimal subnet mask or broadcast address, so only the prefix length is used here.
| IP Address (with Prefix) | ||
|---|---|---|
| IP Address | ||
| IP Address (Full Form) | ||
| Network Address | ||
| IP Prefix: Start | ||
| IP Prefix: End | ||
| IP Prefix: Start (Full Form) | ||
| IP Prefix: End (Full Form) | ||
| Total Addresses | ||
| IP Type |
How the calculation works
The network address is obtained by a bitwise AND of the IPv6 address and the mask derived from the prefix length. The address type is determined from the address’s leading bit pattern (prefix). See the IPv6 Addresses page for more details.