ix.ipacct.net has no CNAME records.
Question and response
Question
dig ix.ipacct.net. NS
Answer
The response has no answer records.
Authority
ipacct.net. 1315 SOA ns.ipacct.bg. noc.ipacct.com. 2021102704 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0