CIDR to IP Range

Network Client-side cidr ip range network ipv4 wildcard

This tool runs entirely client-side, in your browser: your data is never sent anywhere.

What it does

Enter a CIDR block (e.g. 192.168.1.0/28) and instantly get the first and last IP address of the range, plus an optional full listing of every address inside it (capped to avoid freezing your browser on huge ranges).

Try it

How it works

The CIDR prefix determines how many addresses are in the block (2^(32 - prefix)).
The network address (first IP) and broadcast address (last IP) are computed the same way as the Subnet Calculator.
If the range contains 1024 addresses or fewer, every individual address is listed. Larger ranges only show the first/last address and the total count, to keep the browser responsive.

Everything runs locally — nothing is sent anywhere.