IP Range Calculator

Enter a start and end IPv4 address. Get the address count plus normalized range.

Start IP

End IP

First192.168.1.1

Last192.168.1.254

Count254

How to read the result

Count = end − start + 1 as 32-bit integers. Start must be ≤ end; both must be valid dotted-decimal IPv4.

Example

192.168.1.1 – 192.168.1.254 → 254 addresses

FAQ

What if start is after end?

The range is invalid — swap them so start ≤ end.

Does this list the addresses?

No, it only counts. Use the IP Range Generator to list up to 256.

Is my input sent anywhere?

No. All math runs in your browser.