If you have already created a hosted zone then it's very easy to register a sub-domain in Route 53. If not, please go through my post about What is Route 53 and how to create Hosted Zone in AWS . Continuing further -  Login to your AWS account and go to Route 53 service Choose Hosted zones option from the left navigation menu Click on the button Create hosted zone Enter the fully qualified sub-domain name. Here is the trick,  append the word before your main domain to create a sub-domain. For Example, if your domain name is test-domain.com then your sub-domain would be <subdomain-name>. test-domain.com You can add a description in the description box. This is an optional field. Choose the zone type either hosted zone you creating is accessible publically or privately. You can add some tags and the last click on Create hosted zone button. Once hosted zone is created, you will see two records created by default. One with type  SOA  and  another one  NS . Name Server  (also k

Route 53 is a DNS(Domain Name System) web service which connects user requests to internet applications running on AWS or on-premises.  Use Cases - Setting up private DNS Build highly available applications Manage network traffic globally How it works? When end-user tries to open the website in the web browser. DNS Resolver  resolves domain name queries on behalf of the end user. Amazon Route 53 Authoritative DNS Service  returns the IP addresses for DNS records queried by DNS Resolver. Health Checks  monitors the health of your endpoints for high availability. AWS Management Console and Amazon Route 53 SDK/API  are the customer interface which is used for hosted zone creation, traffic policies, and the propagation of the DNS records to the Route 53 global network of authoritative DNS serves. AWS CloudWatch  is used for monitoring matrices and alarms. Finally, Endpoint Instances  receive the end-user request, process, and return the response to the end user. Picture Source - AWS How t