o1.sendgrid.leaddesk.com has no NS records.
NS records for this zone are defined at leaddesk.com.
NS records for this zone are defined at leaddesk.com.
Question and response
Question
dig o1.sendgrid.leaddesk.com. NS
Answer
The response has no answer records.
Authority
leaddesk.com. 900 SOA ns-1976.awsdns-55.co.uk. awsdns-hostmaster.amazon.com. 2025090100 7200 900 1209600 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0