Apex domains cannot have CNAME records.
Question and response
Question
dig ostkom.lv. NS
Answer
ostkom.lv. 5 NS ns2.ostkom.lv.
ostkom.lv. 5 NS ns.ostkom.lv.
Authority
The response has no authority records.
Additional
ns.ostkom.lv. 5 A 89.254.128.62
ns2.ostkom.lv. 5 A 89.254.128.17
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0