gateway.mcmtelecom.com.mx has no NS records.
NS records for this zone are defined at mcmtelecom.com.mx.
NS records for this zone are defined at mcmtelecom.com.mx.
Question and response
Question
dig gateway.mcmtelecom.com.mx. NS
Answer
The response has no answer records.
Authority
mcmtelecom.com.mx. 1200 SOA dns.mcmtelecom.com.mx. dominioscor.mcmtelecom.com.mx. 2026020602 3600 600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0