Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 3,015,121 websites that are Amazon Route 53 Customers. We know of 2,156,496 live websites using Amazon Route 53 and an additional 858,625 sites that used Amazon Route 53 historically and 1,328,958 websites in the United States.
Get a list of 3,015,121 websites using Amazon Route 53 which includes location information, hosting data, contact details, 2,156,496 currently live websites and an additional 1,780,041 domains that redirect to sites in this list. 858,625 sites that used this technology previously and 1,328,958 websites in the United States currently using Amazon Route 53.