o2.ptr5369.envios.tec.mx has no NS records.
NS records for this zone are defined at envios.tec.mx.
NS records for this zone are defined at envios.tec.mx.
Question and response
Question
dig o2.ptr5369.envios.tec.mx. NS
Answer
The response has no answer records.
Authority
envios.tec.mx. 900 SOA ns1e.itesm.mx. please_set_email.absolutely.nowhere. 54 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0