mxpool.epbfi.com has no NS records.
NS records for this zone are defined at epbfi.com.
NS records for this zone are defined at epbfi.com.
Question and response
Question
dig mxpool.epbfi.com. NS
Answer
The response has no answer records.
Authority
epbfi.com. 7200 SOA ns1.epbinternet.com. poc.epbinternet.com. 2026022001 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0