ghs.googlehosted.com has no NS records.
NS records for this zone are defined at googlehosted.com.
NS records for this zone are defined at googlehosted.com.
Question and response
Question
dig ghs.googlehosted.com. NS
Answer
The response has no answer records.
Authority
googlehosted.com. 60 SOA ns1.google.com. dns-admin.google.com. 873609184 900 900 1800 60
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0