Subnet Calculator

Calculate IPv4 subnet ranges from CIDR notation.

IPv4/CIDR input

Subnet details

Run a tool to see output.

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 : Start with Subnet Calculator, then follow the steps below.
Set the inputs : Paste or type the value you want to process.
Run and copy : Use the action buttons, then copy or share the result if you need it elsewhere.

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.

About Subnet Calculator

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