mx1.hostmar.com has no NS records.
NS records for this zone are defined at hostmar.com.
NS records for this zone are defined at hostmar.com.
Question and response
Question
dig mx1.hostmar.com. NS
Answer
The response has no answer records.
Authority
hostmar.com. 14068 SOA ns1.hostmar.com. root.hostmar.com. 2025032601 28800 7200 2000000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0