Apex domains cannot have CNAME records.
Question and response
Question
dig telecom.lt. NS
Answer
telecom.lt. 5 NS ns1.telecom.lt.
telecom.lt. 5 NS ns2.telecom.lt.
telecom.lt. 5 NS ns2.domreg.lt.
Authority
The response has no authority records.
Additional
ns1.telecom.lt. 5 A 212.59.0.1
ns2.domreg.lt. 5 A 83.171.8.8
ns2.telecom.lt. 5 A 212.59.0.2
ns2.domreg.lt. 5 AAAA 2001:778:0:8:0:0:0:8
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0