u8314608.wl109.sendgrid.net has no NS records.
NS records for this zone are defined at wl109.sendgrid.net.
NS records for this zone are defined at wl109.sendgrid.net.
Question and response
Question
dig u8314608.wl109.sendgrid.net. NS
Answer
The response has no answer records.
Authority
wl109.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2399405439 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0