I have a domain registered with namecheap and its DNS records are managed by AWS Route 53. Currently the domain points to a regular EC2 instance. I'd like to get a subdomain set up pointing to a separate EC2 instance (specifically, an Elastic Beanstalk instance). I've got the Beanstalk instance set up (so if I visit the elastic IP for that instance, everything works fine).
THe problem is, all the docs I've seen on adding a subdomain to Route 53 imply that the parent domain's DNS records are still managed by the registrar. I'm unclear as to where I need to add the new NS records for the subdomain in order to have it point to the right thing.