shell:$ nslookup -timeout=2 -retry=1 'pos2u.com'
Server: 75.98.161.224
Address: 75.98.161.224#53
Non-authoritative answer:
Name: pos2u.com
Address: 103.22.180.186
;; Got SERVFAIL reply from 75.98.161.224, trying next server
;; Got SERVFAIL reply from 69.39.86.5
** server can't find pos2u.com: SERVFAIL
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