The exact date of when a domain was registered depends on the domain registrar that was used. If the domain is registered through a domain registrar, the domain will typically have a "created" date which is the date that the domain was first registered. Generally, domain registrations are done on a yearly basis, meaning that if the domain was registered more than a year ago, the exact date may not be available. Additionally, some domain registrars will provide a privacy service which can mask the original registration date of a domain. In such cases, the exact date of registration will not be available.
