Take an IP and try to look for the domain/host associated with it.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Get all possible details about an SSL certificate.
Get all possible details about a domain name.
Extract email addresses from any kind of text content.
Get the web-host of a given website.
Parse details from user agent strings.
Check if the URL is cached or not by Google.
Get details of any file type, such as the mime type or last edit date.
Convert pounds (lb) to kilograms (kg) with ease.