NS3.AFRINIC.NET has no CNAME records.
Question and response
Question
dig NS3.AFRINIC.NET. NS
Answer
The response has no answer records.
Authority
afrinic.net. 2073 SOA ns1.afrinic.net. dns-admin.afrinic.net. 2026022214 14400 3600 36288000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0