portabilidadnumerica.com.mx has no NS records.
NS records for this zone are defined at com.mx.
NS records for this zone are defined at com.mx.
Question and response
Question
dig portabilidadnumerica.com.mx. NS
Answer
The response has no answer records.
Authority
com.mx. 1800 SOA m.mx-ns.mx. hostmaster.nic.mx. 1774123449 900 900 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0