shell:$ nslookup -timeout=2 -retry=1 'm.oi.com.br'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
m.oi.com.br	canonical name = m.oi.net.br.
Name:	m.oi.net.br
Address: 187.6.211.51