expansion.rubberprintdesign.com has no CNAME records.
Question and response
Question
dig expansion.rubberprintdesign.com. NS
Answer
The response has no answer records.
Authority
rubberprintdesign.com. 1538 SOA dns.rubberprintdesign.com. hostmaster.rubberprintdesign.com. 1960920981 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0