Network•Runs on Request
IP Address Validator
Validate IPv4 and IPv6 formats, calculate CIDR subnet masks, broadcast address, and host ranges.
Developer workbench
⌘ / Ctrl + Enter to runConfigure. Run. Inspect.
Requests run only when you click Run. Browser CORS restrictions apply; remote responses are never simulated.
14 input bytes
Output
How to Use IP Address Validator
01
Enter an IP or CIDR block (e.g. 192.168.1.0/24).
02
View subnet mask, wildcard mask, network address, broadcast address, and total usable hosts.
03
Verify whether an IP is public, private (RFC 1918), or loopback.
Frequently Asked Questions
What are RFC 1918 private IPs?
10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are reserved for local internal networks.
Related Developer Tools
Explore more free client-side developer utilities in this category