mx.jsvlac.com has no NS records.
NS records for this zone are defined at jsvlac.com.
NS records for this zone are defined at jsvlac.com.
Question and response
Question
dig mx.jsvlac.com. NS
Answer
The response has no answer records.
Authority
jsvlac.com. 3600 SOA dns.jsvlac.com. hostmaster.jsvlac.com. 1280531411 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0