Amazon's scalable DNS web service system.
http://aws.amazon.com/route53/
Name Server · Enterprise DNS
Get access to data on 1,917,269 websites that are Amazon Route 53 Customers. We know of 432,205 live websites using Amazon Route 53 and an additional 1,485,064 sites that used Amazon Route 53 historically and 275,304 websites in the United States.
Get a list of 1,917,269 websites using Amazon Route 53 which includes location information, hosting data, contact details, 929,385 currently live websites which includes 497,180 domains that redirect to sites in the list. 1,485,064 sites that used this technology previously and 275,304 websites in the United States currently using Amazon Route 53.