mx21-out.a1hosting.bg has no NS records.
NS records for this zone are defined at a1hosting.bg.
NS records for this zone are defined at a1hosting.bg.
Question and response
Question
dig mx21-out.a1hosting.bg. NS
Answer
The response has no answer records.
Authority
a1hosting.bg. 3600 SOA ns1.a1hosting.bg. hostmaster.a1hosting.bg. 2024041605 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0