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

Non-authoritative answer:
Name:	dev.visualwebsiteoptimizer.com
Address: 34.107.218.251
Name:	dev.visualwebsiteoptimizer.com
Address: 2600:1901:0:7f7d::