Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 2,224,713 websites that are Amazon Route 53 Customers. We know of 1,562,247 live websites using Amazon Route 53 and an additional 662,466 sites that used Amazon Route 53 historically and 952,424 websites in the United States.
Get a list of 2,224,713 websites using Amazon Route 53 which includes location information, hosting data, contact details, 1,562,247 currently live websites and an additional 1,405,653 domains that redirect to sites in this list. 662,466 sites that used this technology previously and 952,424 websites in the United States currently using Amazon Route 53.