sjc1-rly1.sdi.trendmicro.com has no NS records.
NS records for this zone are defined at sdi.trendmicro.com.
NS records for this zone are defined at sdi.trendmicro.com.
Question and response
Question
dig sjc1-rly1.sdi.trendmicro.com. NS
Answer
The response has no answer records.
Authority
sdi.trendmicro.com. 86400 SOA sjc1-tmns1.sdi.trendnet.org. dnsadmin.trendmicro.com. 2016033283 10800 900 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0