o1.sendgridmail.tm2app.com has no NS records.
NS records for this zone are defined at sendgridmail.tm2app.com.
NS records for this zone are defined at sendgridmail.tm2app.com.
Question and response
Question
dig o1.sendgridmail.tm2app.com. NS
Answer
The response has no answer records.
Authority
tm2app.com. 1800 SOA aaden.ns.cloudflare.com. dns.cloudflare.com. 2397525359 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0