|Searches through our proprietary historical DNS database for DNS data on a domain. How big is the database? Huge.|
The data accessible here goes back to mid-2010, but our offline data goes back to mid-2008. It covers all .com, .net, .org, .biz, .info, .mobi, and .name domains.
Also, there is access to billions of reverse DNS records:
|Searches 10,676,045,782 reverse DNS records (with about 12.6B more to be added), from Rapid7's Project Sonar, Internet Census 2012, and private sources.|