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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 the size of a text in Bytes (B), Kilobytes (KB) or Megabytes (MB).

Count the amount of characters and words of a given text.

Get the gravatar.com globally recognized avatar for any email.

Check if the URL is banned and marked as safe/unsafe by Google.