I purchased the domain from AWS Route 53 and registered with the AWS Name Server.
I set the DNS server address of my PC to 188.8.131.52 and tried to find my subdomain registered with the AWS name server with the nslookup command.
But there is a ‘non-existent domain’ error.
After the error occurred, I changed the DNS name server address to 184.108.40.206 and checked it again, and I was able to find the domain normally.
I have searched around for an answer to this, and do not seem to be able to find a suitable answer.