knuth.ihsdns.com has no NS records.
NS records for this zone are defined at ihsdns.com.
NS records for this zone are defined at ihsdns.com.
Question and response
Question
dig knuth.ihsdns.com. NS
Answer
The response has no answer records.
Authority
ihsdns.com. 1800 SOA knuth.ihsdns.com. dnsadmin.ihs.com.tr. 2015092800 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0