101.static.mail.hellosign.com has no NS records.
NS records for this zone are defined at hellosign.com.
NS records for this zone are defined at hellosign.com.
Question and response
Question
dig 101.static.mail.hellosign.com. NS
Answer
The response has no answer records.
Authority
hellosign.com. 900 SOA ns-1734.awsdns-24.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0