shell:$ nslookup -timeout=2 -retry=1 'ec2-reachability.amazonaws.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	ec2-reachability.amazonaws.com
Address: 54.192.55.54
Name:	ec2-reachability.amazonaws.com
Address: 54.192.55.8
Name:	ec2-reachability.amazonaws.com
Address: 54.192.55.92
Name:	ec2-reachability.amazonaws.com
Address: 54.192.55.26
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:7e00:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:dc00:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:5c00:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:d200:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:600:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:8800:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:d000:17:251a:5940:93a1
Name:	ec2-reachability.amazonaws.com
Address: 2600:9000:200e:c400:17:251a:5940:93a1