shell:$ nslookup -timeout=2 -retry=1 'mc.sendgrid.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
mc.sendgrid.com	canonical name = d1l684gsaqx9yt.cloudfront.net.
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 3.167.183.97
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 3.167.183.127
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 3.167.183.93
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 3.167.183.100
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:3800:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:f800:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:de00:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:4600:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:4000:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:2e00:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:9200:1:928c:ad40:93a1
Name:	d1l684gsaqx9yt.cloudfront.net
Address: 2600:9000:2873:dc00:1:928c:ad40:93a1