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

Non-authoritative answer:
Name:	sparkpost.com
Address: 18.173.132.39
Name:	sparkpost.com
Address: 18.173.132.64
Name:	sparkpost.com
Address: 18.173.132.33
Name:	sparkpost.com
Address: 18.173.132.76