relay5.TTK.RU has no CNAME records.
Question and response
Question
dig relay5.TTK.RU. NS
Answer
The response has no answer records.
Authority
TTK.RU. 3600 SOA dns-prim.transtk.RU. nsmaster.transtk.RU. 2026030605 10800 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0