adv.domainkey.u2090024.wl025.sendgrid.net has no NS records.
NS records for this zone are defined at wl025.sendgrid.net.
NS records for this zone are defined at wl025.sendgrid.net.
Question and response
Question
dig adv.domainkey.u2090024.wl025.sendgrid.net. NS
Answer
The response has no answer records.
Authority
wl025.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2399863490 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0