em557.comtecint.dk has no NS records.
NS records for this zone are defined at comtecint.dk.
NS records for this zone are defined at comtecint.dk.
Question and response
Question
dig u9973402.wl153.sendgrid.net. NS
Answer
The response has no answer records.
Authority
wl153.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2398670765 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0