dns.prolegal.com.mx has no NS records.
NS records for this zone are defined at prolegal.com.mx.
NS records for this zone are defined at prolegal.com.mx.
Question and response
Question
dig dns.prolegal.com.mx. NS
Answer
The response has no answer records.
Authority
prolegal.com.mx. 86400 SOA dns.prolegal.com.mx. root.dns.prolegal.com.mx. 0 3600 1800 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0