Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 2,075,996 websites that are Amazon Route 53 Customers. We know of 619,464 live websites using Amazon Route 53 and an additional 1,456,532 sites that used Amazon Route 53 historically and 389,423 websites in the United States.
Get a list of 2,075,996 websites using Amazon Route 53 which includes location information, hosting data, contact details, 619,464 currently live websites and an additional 1,171,013 domains that redirect to sites in this list. 1,456,532 sites that used this technology previously and 389,423 websites in the United States currently using Amazon Route 53.