a2.nic.global has no CNAME records.
Question and response
Question
dig a2.nic.global. NS
Answer
The response has no answer records.
Authority
nic.global. 300 SOA a0.nic.global. alerts.afilias.info. 1772782388 3600 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0