IP & Subnet Tools
CIDR to IP Range
Turn a CIDR block like 203.0.113.0/24 into its address range.
📖 New to this? Read What Is CIDR Notation?.
Example
10.0.0.0/22 → first 10.0.0.0, last 10.0.3.255 — a total of 1,024 addresses.
❓ Frequently Asked Questions
What is the CIDR to IP Range used for?
Convert a CIDR block into its first and last IP address and total address count.
Is the CIDR to IP Range free and private?
Yes — it's completely free and runs entirely in your browser. Whatever you enter stays on your device and is never uploaded to any server.
Do I need to install anything to use the CIDR to IP Range?
No. It works in any modern web browser on desktop, tablet, or phone — no downloads, no browser extensions, and no account required.