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Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Take an IP and try to look for the domain/host associated with it.
Get all possible details about an SSL certificate.
Get all possible details about a domain name.
Ping a website, server or port.
Get all the HTTP headers that an URL returns for a typical GET request.
Check whether a website is using the new HTTP/2 protocol or not.
Check whether a website is using the Brotli Compression algorithm or not.
Check if the URL is banned and marked as safe/unsafe by Google.
Check if the URL is cached or not by Google.
Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.
Make sure your passwords are good enough.
Get & verify the meta tags of any website.
Get the web-host of a given website.
Get details of any file type, such as the mime type or last edit date.
Get the gravatar.com globally recognized avatar for any email.
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