blog.xlhost.com has no NS records.
NS records for this zone are defined at xlhost.com.
NS records for this zone are defined at xlhost.com.
Question and response
Question
dig group3.sites.hscoscdn00.net. NS
Answer
The response has no answer records.
Authority
hscoscdn00.net. 1800 SOA jerry.ns.cloudflare.com. dns.cloudflare.com. 2398753082 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0