A few things IT teams reach for often — free to use, nothing to install.
Check if a password has appeared in a known data breach.
Check if an email address has appeared in a known data breach.
Your public IP and location, plus DNS records for any domain.
Expiry date, issuer and trust status for any domain's certificate.
Check whether a domain name is still free to register.
Network, broadcast and usable host range from any IPv4 CIDR.
