dynamic-ip-adsl.viettel.vn.
Question and response
Question
dig 244.171.in-addr.arpa. PTR
Answer
244.171.in-addr.arpa. 5 PTR dynamic-ip-adsl.viettel.vn.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0