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

Non-authoritative answer:
Name:	cdn.optimizely.com
Address: 104.18.65.57
Name:	cdn.optimizely.com
Address: 104.18.66.57
Name:	cdn.optimizely.com
Address: 2606:4700::6812:4239
Name:	cdn.optimizely.com
Address: 2606:4700::6812:4139