mail.flashstart.com has no NS records.
NS records for this zone are defined at flashstart.com.
NS records for this zone are defined at flashstart.com.
Question and response
Question
dig mail.flashstart.com. NS
Answer
The response has no answer records.
Authority
flashstart.com. 600 SOA ns11.domaincontrol.com. dns.jomax.net. 2026021800 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0