Make sure your passwords are good enough.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Get approximate IP details.
Get all possible details about a domain name.