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

Non-authoritative answer:
contaonline.claro.com.br	canonical name = contaonline.claro.net.br.
Name:	contaonline.claro.net.br
Address: 200.169.122.42