poczta.interplus.com.pl has no NS records.
NS records for this zone are defined at interplus.com.pl.
NS records for this zone are defined at interplus.com.pl.
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. 873978624 900 900 1800 60
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0