shell:$ nslookup -timeout=2 -retry=1 'documents.opto22.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
documents.opto22.com	canonical name = d3kkd9hioz0fd1.cloudfront.net.
Name:	d3kkd9hioz0fd1.cloudfront.net
Address: 18.64.183.125
Name:	d3kkd9hioz0fd1.cloudfront.net
Address: 18.64.183.81
Name:	d3kkd9hioz0fd1.cloudfront.net
Address: 18.64.183.61
Name:	d3kkd9hioz0fd1.cloudfront.net
Address: 18.64.183.123