DNS has always been an important service, and when looking at external infrastructure it can provide the opportunity to investigate what kind of infrastructure has been used in the past and currently in use. When looking at DNS we can investigate the relevant records, such as, an A record that maps domain name to IP address to see what the web application is using for hosting.

There may be the case of having the evidence there to suggest when they changed providers, the company might have gone form using AWS to DigitalOcean. We can look into this topic thanks to DNS records. But, how do we look at the history of DNS records?

DNSDumpsters gives us the ability to look at all historic DNS records in one place, simply input the target domain and review the results, like so: