1491854.cloudwaysapps.com has no NS records.
NS records for this zone are defined at cloudwaysapps.com.
NS records for this zone are defined at cloudwaysapps.com.
Question and response
Question
dig 1491854.cloudwaysapps.com. NS
Answer
The response has no answer records.
Authority
cloudwaysapps.com. 900 SOA ns-2016.awsdns-60.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0