Abstract: A domain registry (DR) service executing within a service provider network protects data, such as account data, that is associated with different accounts for testing and/or performing other operations/actions by registering an account with one or more domains. The DR service may register an account in one or more domains based on a request by a user. The operations performed that uses/changes data associated with accounts may be restricted based on the domains for which an account is registered. For example, an account that is registered in a “testing” domain may have different workflows/operations performed using the account data associated with the account registered in the testing domain as compared to an account that is not part of the testing domain.