shell:$ nslookup -timeout=2 -retry=1 'checkip.amazonaws.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
checkip.amazonaws.com	canonical name = checkip.check-ip.aws.a2z.com.
checkip.check-ip.aws.a2z.com	canonical name = checkip.eu-west-1.prod.check-ip.aws.a2z.com.
Name:	checkip.eu-west-1.prod.check-ip.aws.a2z.com
Address: 54.72.231.167
Name:	checkip.eu-west-1.prod.check-ip.aws.a2z.com
Address: 34.242.228.55
Name:	checkip.eu-west-1.prod.check-ip.aws.a2z.com
Address: 52.49.203.77
Name:	checkip.eu-west-1.prod.check-ip.aws.a2z.com
Address: 52.215.147.76
Name:	checkip.eu-west-1.prod.check-ip.aws.a2z.com
Address: 52.51.243.151
Name:	checkip.eu-west-1.prod.check-ip.aws.a2z.com
Address: 54.78.226.8