Apex domains cannot have CNAME records.
Question and response
Question
dig hospedagemdesites.ws. NS
Answer
hospedagemdesites.ws. 2 NS ns2.locaweb.com.br.
hospedagemdesites.ws. 2 NS ns1.locaweb.com.br.
Authority
The response has no authority records.
Additional
ns1.locaweb.com.br. 2 A 186.202.8.254
ns2.locaweb.com.br. 2 A 187.45.248.254
ns1.locaweb.com.br. 2 AAAA 2804:218:7000:0:186:202:8:254
ns2.locaweb.com.br. 2 AAAA 2804:218:7001:0:187:45:248:254
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0