mail.primoplus.bg has no NS records.
NS records for this zone are defined at primoplus.bg.
NS records for this zone are defined at primoplus.bg.
Question and response
Question
dig mail.primoplus.bg. NS
Answer
The response has no answer records.
Authority
primoplus.bg. 1800 SOA desiree.ns.cloudflare.com. dns.cloudflare.com. 2398579097 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0