ns4.goskope.com has no NS records.
NS records for this zone are defined at goskope.com.
NS records for this zone are defined at goskope.com.
Question and response
Question
dig ns4.goskope.com. NS
Answer
The response has no answer records.
Authority
goskope.com. 300 SOA ns1.goskope.opskope.com. hostmaster.nsone.net. 1773168587 3600 600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0