muc1-tmns3.sdi.trendnet.org has no NS records.
NS records for this zone are defined at trendnet.org.
NS records for this zone are defined at trendnet.org.
Question and response
Question
dig muc1-tmns3.sdi.trendnet.org. NS
Answer
The response has no answer records.
Authority
trendnet.org. 3600 SOA sjc1-tmns1.sdi.trendnet.org. dnsadmin.trendmicro.com. 273 900 600 86400 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0