help.netdesignhost.com has no NS records.
NS records for this zone are defined at netdesignhost.com.
NS records for this zone are defined at netdesignhost.com.
Question and response
Question
dig netdesignhelp.zendesk.com. NS
Answer
The response has no answer records.
Authority
zendesk.com. 900 SOA ns-1213.awsdns-23.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0