cloud.acronis.com has no NS records.
NS records for this zone are defined at acronis.com.
NS records for this zone are defined at acronis.com.
Question and response
Question
dig cloud.acronis.com. NS
Answer
The response has no answer records.
Authority
acronis.com. 900 SOA ns-809.awsdns-37.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0