IIS - When I type the site address, it turns in IP address

In my internal network I have an IIS server with an internal website, and I have the dns record in my dns server.

Something like: website: http://ift.tt/2fjbgqb and the DNS record to intranet..contoso.net >>> 10.180.10.10

Now, when I open my browser and I type http://ift.tt/2fjbgqb and press enter, the address turns into the IP Address, and then i display correctly the website.

How can i avoid this? I don't want display my server IP address in my browser.