appel14.opersta.eu.com has no NS records.
NS records for this zone are defined at opersta.eu.com.
NS records for this zone are defined at opersta.eu.com.
Question and response
Question
dig appel14.opersta.eu.com. NS
Answer
The response has no answer records.
Authority
opersta.eu.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1767776461 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0