block.bumphuk.com has no CNAME records.
Question and response
Question
dig block.bumphuk.com. NS
Answer
The response has no answer records.
Authority
bumphuk.com. 3327 SOA dns.bumphuk.com. hostmaster.bumphuk.com. 1386715640 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0