ns-a-2.getresponse360.pl has no CNAME records.
Question and response
Question
dig ns-a-2.getresponse360.pl. NS
Answer
The response has no answer records.
Authority
getresponse360.pl. 664 SOA ns-a-1.getresponse.com. hostmaster.implix.com. 2013060501 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0