ns4.seacomnet.com has no CNAME records.
Question and response
Question
dig ns4.seacomnet.com. NS
Answer
The response has no answer records.
Authority
seacomnet.com. 2203 SOA ns3.seacomnet.com. hostmaster.seacom.mu. 2025063091 10800 3600 2419200 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0