master.nic.EC has no CNAME records.
Question and response
Question
dig master.nic.EC. NS
Answer
The response has no answer records.
Authority
nic.EC. 388 SOA master.nic.EC. dnsadmin.nic.EC. 2026020901 21600 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0