Amazon Route 53
API Reference


Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service. Route 53 performs three main functions:

  • Domain registration – Route 53 helps lets you register domain names such as

  • Domain Name System (DNS) service – Route 53 translates friendly domains names like into IP addresses like Route 53 responds to DNS queries using a global network of authoritative DNS servers, which reduces latency.

  • Health checking – Route 53 sends automated requests over the Internet to your application to verify that it's reachable, available, and functional.

This Amazon Route 53 API Reference explains how to use API actions to create the following resources:

Public Hosted Zones

A public hosted zone is a container that holds information about how you want to route traffic on the Internet for a domain, such as, and its subdomains.

Private Hosted Zones

A private hosted zone is a container that holds information about how you want to route traffic for a domain and its subdomains within one or more Amazon Virtual Private Clouds (Amazon VPCs).

Reusable Delegation Sets

By default, each hosted zone that you create gets a different set of four name servers—a different delegation set. If you create a lot of hosted zones, maintaining different delegation sets can be difficult and time consuming. Route 53 lets you create a delegation set that you can reuse with multiple hosted zones.

Resource Record Sets

After you create a hosted zone for your domain, such as, you create resource record sets to tell the Domain Name System (DNS) how to route traffic for that domain.

Traffic Policies and Traffic Policy Instances

You can create complex routing configurations, known as traffic policies, that use weighted, latency, failover, and geolocation resource record sets. You can then associate a traffic policy with a domain name or subdomain name, such as, by creating a traffic policy instance. When users submit DNS queries for the domain or subdomain, Route 53 responds based on the traffic policy that you used to create the traffic policy instance.

Health Checks

Route 53 health checks monitor the health and performance of your web applications, web servers, and other resources. At regular intervals that you specify, Route 53 submits automated requests over the Internet to your application, server, or other resource to verify that it's reachable, available, and functional.

Domain Registrations

When you want to get a new domain name, such as, you can register it with Route 53. You can also transfer the registration for existing domains from other registrars to Route 53.


A tag is a label that you assign to an AWS resource. Each tag consists of a key and a value, both of which you define. You can use tags for a variety of purposes; one common use is to categorize and track your Route 53 costs.

In addition, the Amazon Route 53 API Reference includes the following information:

  • Making API Requests – How to submit HTTP requests to Route 53

  • Traffic Policy Document Format – Syntax and examples for the document that you include when you create a traffic policy programmatically

For information about Route 53 concepts and about how to use the Route 53 console, see the Amazon Route 53 Developer Guide.