Domain is a unique name used to identify the IP address of a computer server. It had a function to facilitate visitors in accessing and remembering the addresses of the website. Organized by PANDI, Indonesia has.id as country code Top Level Domain (ccTLD). Unfortunately, the.id domain in Indonesia penetration was relatively low, with a ratio of 1:855 and the high gap among registrars. This research identified and analyzed factors influencing.id domain purchasing through website channels to fix that situation effectively. This research aimed to determine which factors influence users in purchasing a.id domain through website channels by using a combined research model from Website Quality, Theory of Planned Behavior, Brand Equity Website, and Social Website Interactivity. By involving 143 respondents in an online questionnaire, this research employed 11 hypotheses, nine of them were accepted while two others were rejected. It was using Partial List Square-Structural Equation Modeling (PLS-SEM). They proved factors that influence the.id domains purchasing through the website were: trust, brand experience, and brand choice. They were supported by website quality and social website interactivity while attitude and social response did not.