ns4.hostia.name has no CNAME records.
Question and response
Question
dig ns4.hostia.name. NS
Answer
The response has no answer records.
Authority
hostia.name. 2091 SOA dns1.hostia.name. hostmaster.hostia.name. 2025111605 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0