ns.chiapas.gob.mx has no MX records.
Question and response
Question
dig ns.chiapas.gob.mx. MX
Answer
The response has no answer records.
Authority
chiapas.gob.mx. 3600 SOA ns.chiapas.gob.mx. root.chiapas.gob.mx. 202601274 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0