Question and response
Question
dig puctup.com. MX
Answer
puctup.com. 1800 MX 10 mail.puctup.com.
Authority
puctup.com. 1800 NS dns1.registrar-servers.com.
puctup.com. 1800 NS dns2.registrar-servers.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0