Subnet Calculator
With the Subnet Calculator you can calculate a subnet, split subnets and create a wide subnet. Both IPv4 and IPv6 are supported.
Calculator
On the Calculator tab, you can calculate a subnet by entering the IP address and the subnet mask. The subnet mask can be entered in CIDR notation.
Example inputs:
10.0.0.0/16192.168.0.0/255.255.255.02001:db8::/32
Right-click on the result to copy the information.
Subnetting
On the Subnetting tab, you can split a subnet into smaller subnets. The subnet mask can be entered in CIDR notation.
Example inputs:
| Subnet | New subnet mask |
|---|---|
10.0.0.0/16 | /18 |
192.168.0.0/255.255.255.0 | 255.255.255.128 |
2001:db8::/32 | /48 |
Right-click on the result to copy or export the information.
Wide Subnet
On the Wide Subnet tab, you can create a wide subnet that includes both given subnets. The subnet mask can be entered in CIDR notation.
Example inputs:
| Subnet 1 | Subnet 2 |
|---|---|
10.0.0.0/16 | 10.2.0.0/16 |
192.168.0.0/255.255.255.0 | 192.168.4.0/23 |
IPv6 is not supported.
Right-click on the result to copy the information.