shell:$ nslookup -timeout=2 -retry=1 'hr.facebook.com'
Server: 75.98.161.224
Address: 75.98.161.224#53
Non-authoritative answer:
hr.facebook.com canonical name = intern-regional.vvv.facebook.com.
Name: intern-regional.vvv.facebook.com
Address: 10.110.135.10
Name: intern-regional.vvv.facebook.com
Address: 2401:db00:21ff:ff43:face:b00c:0:75c6
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