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: 54.192.55.59
Name:	d231nib0azwqs1.cloudfront.net
Address: 54.192.55.14
Name:	d231nib0azwqs1.cloudfront.net
Address: 54.192.55.108
Name:	d231nib0azwqs1.cloudfront.net
Address: 54.192.55.41
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:f800:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:1000:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:d200:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:9600:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:a000:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:e000:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:fc00:10:735e:a440:93a1
Name:	d231nib0azwqs1.cloudfront.net
Address: 2600:9000:200e:3200:10:735e:a440:93a1