shell:$ nslookup -timeout=2 -retry=1 'letsencrypt.org'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	letsencrypt.org
Address: 98.84.224.111
Name:	letsencrypt.org
Address: 18.208.88.157
Name:	letsencrypt.org
Address: 2600:1f18:16e:df01::259
Name:	letsencrypt.org
Address: 2600:1f18:16e:df01::258