mail.higia.com.mx has no NS records.
NS records for this zone are defined at higia.com.mx.
NS records for this zone are defined at higia.com.mx.
Question and response
Question
dig mail.higia.com.mx. NS
Answer
The response has no answer records.
Authority
higia.com.mx. 3600 SOA ns1.net.mexline.com. sistemas.laboratorioshigia.com. 1769132469 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0