shell:$ nslookup -timeout=2 -retry=1 'www.bancolombia.co'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
www.bancolombia.co	canonical name = www.grupobancolombia.com.
www.grupobancolombia.com	canonical name = df29zzv.ng.impervadns.net.
Name:	df29zzv.ng.impervadns.net
Address: 45.60.241.99