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

Non-authoritative answer:
Name:	opensource.fb.com
Address: 18.165.83.71
Name:	opensource.fb.com
Address: 2600:9000:24f4:8800:1f:2d3:8440:93a1