Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 2,407,036 websites that are Amazon Route 53 Customers. We know of 1,652,317 live websites using Amazon Route 53 and an additional 754,719 sites that used Amazon Route 53 historically and 1,003,268 websites in the United States.
Get a list of 2,407,036 websites using Amazon Route 53 which includes location information, hosting data, contact details, 1,652,317 currently live websites and an additional 1,475,952 domains that redirect to sites in this list. 754,719 sites that used this technology previously and 1,003,268 websites in the United States currently using Amazon Route 53.