shell:$ nslookup -timeout=2 -retry=1 'smtp.secureserver.net'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	smtp.secureserver.net
Address: 216.69.141.84
Name:	smtp.secureserver.net
Address: 216.69.141.113
Name:	smtp.secureserver.net
Address: 216.69.141.71