shell:$ nslookup -timeout=2 -retry=1 'u30544826.ct.sendgrid.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	u30544826.ct.sendgrid.net
Address: 3.225.139.230
Name:	u30544826.ct.sendgrid.net
Address: 100.29.61.130
Name:	u30544826.ct.sendgrid.net
Address: 18.116.152.91
Name:	u30544826.ct.sendgrid.net
Address: 3.148.148.237
Name:	u30544826.ct.sendgrid.net
Address: 3.20.193.86
Name:	u30544826.ct.sendgrid.net
Address: 44.199.17.152