.org

Among the original generic extensions delegated in 1985, .org was set aside for organizations falling outside the commercial and network categories. Public Interest Registry operates it today, and approximately 10.8 million domains are registered. No formal eligibility restriction exists — any applicant may acquire an .org name — yet the extension's association with nonprofits, charities, open-source projects, and community groups has proved unusually durable. That association, rather than any registry policy, is the reason most registrants select it over an unrestricted alternative.