shell:$ nslookup -timeout=2 -retry=1 'netshow.oi.com.br'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
netshow.oi.com.br	canonical name = oi.com.br.
Name:	oi.com.br
Address: 187.6.211.40