vm2.mcm.net.mx has no NS records.
NS records for this zone are defined at mcm.net.mx.
NS records for this zone are defined at mcm.net.mx.
Question and response
Question
dig vm2.mcm.net.mx. NS
Answer
The response has no answer records.
Authority
mcm.net.mx. 700 SOA dns2.mcm.net.mx. dnsmaster.mcmtelecom.com.mx. 2026011301 700 600 604800 700
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0