Apex domains cannot have CNAME records.
Question and response
Question
dig eastern-tele.com. NS
Answer
eastern-tele.com. 5 NS adns1.eastern-tele.com.
eastern-tele.com. 5 NS adns2.eastern-tele.com.
Authority
The response has no authority records.
Additional
adns1.eastern-tele.com. 5 A 203.167.103.8
adns2.eastern-tele.com. 5 A 203.167.103.28
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0