IP Address Validator
Validate IPv4 and IPv6 formats, calculate CIDR subnet masks, broadcast address, and host ranges.
How to Use IP Address Validator
Enter an IP or CIDR block (e.g. 192.168.1.0/24).
View subnet mask, wildcard mask, network address, broadcast address, and total usable hosts.
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.
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