dns4.winnethost.com has no NS records.
NS records for this zone are defined at winnethost.com.
NS records for this zone are defined at winnethost.com.
Question and response
Question
dig dns4.winnethost.com. NS
Answer
The response has no answer records.
Authority
winnethost.com. 86400 SOA dns4.winnethost.com. hostmaster.winnethost.com. 2015061726 1800 900 604800 86400
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0