> Run your own DNS server and even cache the hostname/IP pairs yourself. This[1] might be a useful resource to get started: [1] https://scans.io/ https://scan

> Run your own DNS server and even cache the hostname/IP pairs yourself. This[1] might be a useful resource to get started: [1] https://scans.io/ https://scans.io/ (Register and download the IPv4 Address Space data file to use as an initial cache and then append/update as you go.)