Your IDX tools are hosted on IDX Broker's servers and are provided to you in your account in the form of Page Links. By default, Page Links are hosted on a subdomain of idxco.com. You also have the option of setting up a custom subdomain using the Domain Control feature in your control panel. Whether you choose to use the standard idxco.com subdomain, or a custom subdomain, you can update the subdomain for your IDX Page Links in your control panel under Account Management -> Domain Control.