sm13731.flexidomain.com has no NS records.
NS records for this zone are defined at flexidomain.com.
NS records for this zone are defined at flexidomain.com.
Question and response
Question
dig sm13731.flexidomain.com. NS
Answer
The response has no answer records.
Authority
flexidomain.com. 3600 SOA klmail2. admin. 1156 900 600 86400 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0