Subnet Calculator
About Subnet Calculator
Enter an IPv4 address with CIDR prefix to find network, mask, broadcast, usable range, and host count.
How to Use
Enter an IPv4 address with CIDR prefix to find network, mask, broadcast, usable range, and host count. Enter your value in the ipv4/cidr input field, then review the subnet details before copying or downloading it.
- Open the tool : Go to Subnet Calculator to use the tool.
- Review the controls : Enter your value or input directly in the tool.
- Use the result : Run the action you need, then copy or share the output.
Common Questions
What does Subnet Calculator help inspect or debug?
Calculate IPv4 subnet ranges from CIDR notation.
Can I copy or export the result from Subnet Calculator?
Yes. Use the copy button or any download option that appears after the result is generated.
What is a subnet mask used for?
A subnet mask is a 32-bit number that masks an IP address, dividing it into two parts: the network address and the host address. This allows routers to efficiently determine if traffic is bound for a local network or if it needs to be routed externally.
What is CIDR notation?
CIDR (Classless Inter-Domain Routing) notation is a compact way to represent an IP address and its associated routing prefix. Instead of writing out a full subnet mask like 255.255.255.0, it is appended to the IP address with a slash, such as /24, indicating the number of masked bits.
Actions
- Calculate subnet