201-43-136-249.dsl.telesp.net.br has no CNAME records.
Question and response
Question
dig 201-43-136-249.dsl.telesp.net.br. NS
Answer
The response has no answer records.
Authority
dsl.telesp.net.br. 617 SOA dnsqipbr1.telesp.net.br. root.telesp.net.br. 2010072121 21600 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0