First Time User Registration Options To gain access to the IRWIN Customer Connection, you first need to register. There are three registration options. Please select an option from the choices on the right. If you know your IRWIN account number and want to gain immediate access, please click here If you do not know your IRWIN account number but want to register online, please use this option. Once you submit the registration form, we will confirm your registration by sending you an email with your User ID and password. To register via phone, please contact our Customer Service Department at: 1-800-866-5741.