Viewport width=device-width, initial-scale=1, shrink-to-fit=no Description Online tools to analyze domain name or IP address configuration, check and test whois, DNS, MX, web server, mxtoolbox. Twitter:card summary Twitter:title NS.tools: Check DNS domain or IP, test DNS lookup Twitter:description Online tools to analyze domain name or IP address configuration, check and test whois, DNS, MX, web server, mxtoolbox. Twitter:image https: