dnsapi3.choopa.com has no NS records.
NS records for this zone are defined at choopa.com.
NS records for this zone are defined at choopa.com.
Question and response
Question
dig dnsapi3.choopa.com. NS
Answer
The response has no answer records.
Authority
choopa.com. 300 SOA ns1.choopadns.com. abuse.choopa.com. 0 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0