mx1.tld-mx.com has no NS records.
NS records for this zone are defined at tld-mx.com.
NS records for this zone are defined at tld-mx.com.
Question and response
Question
dig mx1.tld-mx.com. NS
Answer
The response has no answer records.
Authority
tld-mx.com. 3600 SOA ns1.tld-nscloud.com. support.cloudns.net. 2026021901 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0