Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 1,840,516 websites that are Amazon Route 53 Customers. We know of 1,257,393 live websites using Amazon Route 53 and an additional 583,123 sites that used Amazon Route 53 historically and 787,111 websites in the United States.
Get a list of 1,840,516 websites using Amazon Route 53 which includes location information, hosting data, contact details, 1,257,393 currently live websites and 583,123 sites that used this technology previously and 787,111 websites in the United States currently using Amazon Route 53.