iPad browser restricting web api's having alias name

My web application is using IIS-7 as the web server,it has multiple web apis like

http://ift.tt/1KhTgoK

http://ift.tt/1GHrUDN

So we have these web api at different ports.So we are using the alias name abcapps here. From Browser we are hitting these api's using Ajax call.This works well in desktop,but when we try from iPad,it restricts the call. But,When we remove the alias name from the api's then it works fine in iPad also.So the api's without alias name will be like

http://ift.tt/1KhTj3S

http://ift.tt/1GHrRYy

Why this is happening and is there any solution for this?