shell:$ nslookup -timeout=2 -retry=1 'cdn.sendgrid.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
cdn.sendgrid.com	canonical name = d2gramajkvysi4.cloudfront.net.
Name:	d2gramajkvysi4.cloudfront.net
Address: 108.159.224.93
Name:	d2gramajkvysi4.cloudfront.net
Address: 108.159.224.44
Name:	d2gramajkvysi4.cloudfront.net
Address: 108.159.224.70
Name:	d2gramajkvysi4.cloudfront.net
Address: 108.159.224.78