ns2.aciglobal.com has no CNAME records.
Question and response
Question
dig ns2.aciglobal.com. NS
Answer
The response has no answer records.
Authority
aciglobal.com. 300 SOA ns1.aciglobal.com. hostmaster.aciglobal.com. 2026012901 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0