shell:$ nslookup -timeout=2 -retry=1 'myunitel.duckdns.org'
Server: 1.1.1.1
Address: 1.1.1.1#53
Non-authoritative answer:
Name: myunitel.duckdns.org
Address: 172.67.128.66
;; communications error to 1.1.1.1#53: timed out
;; communications error to 8.8.8.8#53: timed out
;; no servers could be reached
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