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Find a domain's name server (NS) records.
View a domain's whois registration details.
Find an IP address's location and ISP.
Check a site's SSL certificate validity and expiry.
Measure a page's load time and size.
Analyze title, description and Open Graph tags.
View and validate a site's robots.txt file.
Find the XML sitemap and count its URLs.
Query A, AAAA, MX, TXT, CNAME and NS records.
Inspect a server's HTTP response headers.