Hi ohashi, we do not only track the current and historical whois records, but also current and historical DNS records, even for subdomain, which technologies the website uses and even more data which we are currently working on. Maybe try our WHOIS aggregation feature and let us know what you think!
Nice find bananamansion. Actually you will see this with many big cooperations which also register domains such as <companyname>.sucks, <companyname>.adult etc. ;)
Hi kuschku, thanks for providing us with the samples with the outdated/missing data. We will definitely look into the case and continue to enhance the data we collect.
The UI enhancements you mention are excellent - we will implement this shortly (not only for .de but for any case where we can not output any values).
Feel free to contact us at the e-mail address given at the bottom on every dnstrails page!