shell:$ nslookup -timeout=2 -retry=1 'clases.edu.sv'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	clases.edu.sv
Address: 104.18.18.207
Name:	clases.edu.sv
Address: 104.18.19.207
Name:	clases.edu.sv
Address: 2606:4700::6812:12cf
Name:	clases.edu.sv
Address: 2606:4700::6812:13cf