shell:$ nslookup -timeout=2 -retry=1 'ec2-54-254-196-39.ap-southeast-1.compute.amazonaws.com' Server: 1.1.1.1 Address: 1.1.1.1#53 Non-authoritative answer: Name: ec2-54-254-196-39.ap-southeast-1.compute.amazonaws.com Address: 54.254.196.39