mx201.skynet.be has no CNAME records.
Question and response
Question
dig mx201.skynet.be. NS
Answer
The response has no answer records.
Authority
skynet.be. 3600 SOA ns1.skynet.be. dnsmaster.skynet.be. 2002088812 1200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0