About IP to Binary

Converting an IP address to binary

This tool shows an IPv4 address in binary: each of the four number blocks becomes eight digits of ones and zeros.

In that form it becomes visible which part of the address identifies the network and which the individual device.

How to use it

Enter the address in the usual dotted notation. Each block has to be between 0 and 255.

Compare the binary form against the subnet mask to see how many digits belong to the network portion.

What it is useful for

Necessary for working out subnets and understanding why two addresses sit in the same network or in different ones.

It also helps when setting firewall rules, since it makes range boundaries explicit.

Frequently asked questions

Are IPv6 addresses supported?

This tool is built for IPv4 with four number blocks. IPv6 uses a different notation.

Why is my input rejected?

Usually a block exceeds 255 or a dot is missing. Check the notation.

How do I identify the network portion?

From the subnet mask: its ones mark the digits belonging to the network.