NS2.telmex.net.pe has no CNAME records.
Question and response
Question
dig NS2.telmex.net.pe. NS
Answer
The response has no answer records.
Authority
telmex.net.pe. 3600 SOA dns1.amx.com.pe. hostmaster.telmex.net.pe. 2012120410 5400 600 90000 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0