mx01.ihs.com.tr has no NS records.
NS records for this zone are defined at ihs.com.tr.
NS records for this zone are defined at ihs.com.tr.
Question and response
Question
dig mx01.ihs.com.tr. NS
Answer
The response has no answer records.
Authority
ihs.com.tr. 1800 SOA rosalie.ns.cloudflare.com. dns.cloudflare.com. 2400105757 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0