u950281.wl032.sendgrid.net has no NS records.
NS records for this zone are defined at wl032.sendgrid.net.
NS records for this zone are defined at wl032.sendgrid.net.
Question and response
Question
dig u950281.wl032.sendgrid.net. NS
Answer
The response has no answer records.
Authority
wl032.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2398620004 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0