Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 2,072,864 websites that are Amazon Route 53 Customers. We know of 1,467,422 live websites using Amazon Route 53 and an additional 605,442 sites that used Amazon Route 53 historically and 910,117 websites in the United States.
Get a list of 2,072,864 websites using Amazon Route 53 which includes location information, hosting data, contact details, 2,717,720 currently live websites which includes 1,250,298 domains that redirect to sites in the list. 605,442 sites that used this technology previously and 910,117 websites in the United States currently using Amazon Route 53.