webmail.wtcmexico.com.mx has no NS records.
NS records for this zone are defined at wtcmexico.com.mx.
NS records for this zone are defined at wtcmexico.com.mx.
Question and response
Question
dig webmail.wtcmexico.com.mx. NS
Answer
The response has no answer records.
Authority
wtcmexico.com.mx. 3600 SOA ns-mty.axtel.net. soporteip.axtel.com.mx. 762215068 7200 1200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0