Question and response
Question
dig _sip._tcp.admin.dc1.ru.itoolabs.net. SRV
Answer
_sip._tcp.admin.dc1.ru.itoolabs.net. 3600 SRV 10 0 5060 dd.dc1.ru.itoolabs.net.
Authority
The response has no authority records.
Additional
dd.dc1.ru.itoolabs.net. 3600 A 109.69.176.249
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0