Directory ASP Hosting Information - We are 100% focused on Microsoft Windows Hosting. ASP is a feature of the Microsoft Internet Information Server. ASP files must end with a .asp extension in order to be processed by the server. Because ASP files were meant to deliver HTML files, you can include normal HTML tags inside of your ASP files. You can have your domain name as long as 22 characters, not including the .com (or .edu, .net, etc.). Please note that the domain must consist only of letters, numbers and dashes. Because the server-side script is simply building a regular HTML page, however, ASP can be delivered to any browser. The parts of the code that are to be executed on the server are enclosed within tags. These symbols are referred to as the delimiters for ASP.