See the difference in the two urls: http://www.adobeexchange.com vs http://adobeexchange.com [the content I see for this url is the same as http://www.backstageuniversity.com]
:)
$ host adobeexchange.com adobeexchange.com has address 54.243.241.250 adobeexchange.com mail is handled by 10 aspmx2.googlemail.com. adobeexchange.com mail is handled by 10 aspmx3.googlemail.com. adobeexchange.com mail is handled by 1 aspmx.l.google.com. adobeexchange.com mail is handled by 5 alt1.aspmx.l.google.com. adobeexchange.com mail is handled by 5 alt2.aspmx.l.google.com.
$ host www.adobeexchange.com www.adobeexchange.com is an alias for ag-us1-prod.adobeexchange.com. ag-us1-prod.adobeexchange.com is an alias for ag-us1-prod-531517106.us-east-1.elb.amazonaws.com. ag-us1-prod-531517106.us-east-1.elb.amazonaws.com has address 54.235.105.222 ag-us1-prod-531517106.us-east-1.elb.amazonaws.com has address 50.19.224.113 ag-us1-prod-531517106.us-east-1.elb.amazonaws.com has address 54.197.240.10