CIDR IP Range Converter
Enter CIDR notation (e.g. 10.0.0.0/22) to calculate the start IP, end IP, and total number of IPs. Handy for firewall and ACL setup — all calculations happen inside your browser.
Enter CIDR to see the result.
0
Total IPs
-Start IP
-End IP
How to use
- Enter the CIDR notation (IP address/prefix).
- The start IP, end IP, and total number of IPs are calculated automatically.
- Use it to specify IP ranges in firewalls and ACLs.
Frequently asked questions
Does the total include the network and broadcast addresses?
Yes. Here the total number of IPs is the entire address count including the network and broadcast addresses (2 to the power of (32 − prefix)).
Can I use it for firewall setup?
Yes. It turns CIDR into a start-to-end IP range, which is handy for specifying IP ranges in firewalls or ACLs.
Are the values I enter sent to a server?
No. All calculations happen only inside your browser, and the values you enter are never sent to or stored on any server.