mail.curtcpa.com has no NS records.
NS records for this zone are defined at curtcpa.com.
NS records for this zone are defined at curtcpa.com.
Question and response
Question
dig mail.curtcpa.com. NS
Answer
The response has no answer records.
Authority
curtcpa.com. 3600 SOA NS61.WORLDNIC.com. namehost.WORLDNIC.com. 125031211 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0