Validate IP addresses for correct IPv4 and IPv6 format.
The IP Address Validator checks whether a string is a properly formatted IPv4 or IPv6 address — correct octet ranges (0-255) for IPv4, valid hex groups and compression rules for IPv6 — and tells you which version it is. It's a quick sanity check before an address goes into a firewall rule, config file, or allow-list.
Made for developers. Typical uses:
Syntax and format checks find broken markup, bad JSON and mistyped numbers, but not meaning, business rules, email deliverability or whether a URL is alive.
Explore more in Validators, read the guides and articles, or see how we test our tools.
Find your public IP address and location details.
Best for verifying a VPN or proxy is actually masking your IP
Look up DNS records for any domain.
Best for verifying MX records are set up correctly after configuring email
Check domain registration details.
Best for checking when a domain is due to expire before it lapses
Validate MAC addresses for correct format and structure.
Best for checking a MAC address before adding it to a router's device allow-list
Find geographic location of IP addresses.
Best for investigating the origin of suspicious website traffic