IPv6 VLSM — Variable Length Subnet Mask
Enter a base IPv6 network and list each subnet's host requirement. The calculator will allocate the most efficient subnets (largest first).
VLSM Results
IPv6 SLSM — Static Length Subnet Mask
Split a base IPv6 network evenly into n equal subnets. Useful when you want equal-sized subnets.
SLSM Results
IPv6 CIDR Inspector
Enter an IPv6 CIDR block and inspect its properties.
| Network | |
|---|
| Prefix Length | |
|---|
| First Address | |
|---|
| Last Address | |
|---|
| Total Addresses | |
|---|
| Usable Addresses | |
|---|
| Network Range | |
|---|
| Address Space Type | |
|---|
IPv6 Subnet Calculator
Calculate subnets from a base IPv6 network.
Subnet Results
IPv6 Prefix Chart (/0 to /128)
Displays prefix length, number of total and usable addresses for each IPv6 CIDR block.
IPv6 Prefix Chart
| Prefix |
Total Addresses |
Usable Addresses |
Address Space |
ISP Usage |
ISP IPv6 Allocation Planning
Plan IPv6 allocations for different ISP infrastructure components.
IPv6 Calculator