Amazon Route 53 is a highly available, reliable and cost-effective service for managing domains offered by AWS. It is a scalable Domain Name System (DNS) service named by the TCP or UDP port 53, which is where DNS server requests are addressed. Like any DNS service, Route 53 handles domain registration and routes users’ Internet requests to your application — whether it’s hosted on AWS or elsewhere.
When you create a record, you choose a routing policy, which determines how Amazon Route 53 responds to queries: