revenuessimple.mailofisi.com has no NS records.
NS records for this zone are defined at mailofisi.com.
NS records for this zone are defined at mailofisi.com.
Question and response
Question
dig revenuessimple.mailofisi.com. NS
Answer
The response has no answer records.
Authority
mailofisi.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1761302857 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0