Apex domains cannot have CNAME records.
Question and response
Question
dig 60.149.217.in-addr.arpa. NS
Answer
60.149.217.in-addr.arpa. 5 NS ns2.cygate.fi.
60.149.217.in-addr.arpa. 5 NS ns1.cygate.fi.
Authority
The response has no authority records.
Additional
ns1.cygate.fi. 4 A 81.20.229.4
ns2.cygate.fi. 4 A 81.20.224.133
ns1.cygate.fi. 4 AAAA 2001:67c:110:4301:0:0:0:10
ns2.cygate.fi. 4 AAAA 2001:67c:110:2:0:0:0:10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0