io.TELCONET.NET has no CNAME records.
Question and response
Question
dig io.TELCONET.NET. NS
Answer
The response has no answer records.
Authority
TELCONET.NET. 818 SOA srv1.TELCONET.NET. hostmaster.TELCONET.NET. 2585 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0