shell:$ nslookup -timeout=2 -retry=1 'hr.facebook.com'
Server: 1.1.1.1
Address: 1.1.1.1#53
Non-authoritative answer:
hr.facebook.com canonical name = intern-regional.vvv.facebook.com.
Name: intern-regional.vvv.facebook.com
Address: 10.110.159.20
Name: intern-regional.vvv.facebook.com
Address: 2401:db00:ff:ff4f:face:b00c:0:75c6
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