shell:$ nslookup -timeout=2 -retry=1 'pennacool-sso.discoverflow.co'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
pennacool-sso.discoverflow.co	canonical name = d231nib0azwqs1.cloudfront.net.
Name:	d231nib0azwqs1.cloudfront.net
Address: 18.238.25.94
Name:	d231nib0azwqs1.cloudfront.net
Address: 18.238.25.44
Name:	d231nib0azwqs1.cloudfront.net
Address: 18.238.25.24
Name:	d231nib0azwqs1.cloudfront.net
Address: 18.238.25.120
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:5800:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:4e00:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:5c00:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:7000:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:9800:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:be00:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:7c00:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:25f5:5600:10:735e:a440:93a1