problem with domaine

Both www.abtours.be and abtours.b-communication.be point to the same IP: 37.187.75.90.

Code:

$ curl -I www.abtours.be
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Wed, 03 Feb 2016 14:31:57 GMT
Content-Type: text/html; charset=iso-8859-1
Connection: keep-alive
Location: http://abtours.b-communication.be/

So your webserver or application is creating the redirect.