This conference talk explores the challenges and innovations in mass DNS scanning, presented by Jasper Insinger at Recon Village during DEF CON 32. Discover SanicDNS, an ultra-fast open-source DNS scanner that revolutionizes internet reconnaissance with speeds 100 times faster than traditional tools. Learn about the advanced parallelization techniques that power this tool, the development challenges overcome, and practical applications for security professionals including DNS misconfiguration discovery and Nameserver takeover scans. Watch a live demonstration of SanicDNS in action and understand how this tool enables real-time internet-wide reconnaissance. The presentation includes details on the open-source release of SanicDNS at DEF CON, complete with installation instructions for the security community.