Systems, devices, and techniques for multiple device and multiple line enabled computing devices and computing appliances are described herein. A device number can be assigned to a computing device and can be unique to the computing device. A plurality of alias numbers can be provided to the computing device and enabled for use by the computing device. Alias numbers can be enabled on multiple computing appliances, such that a user can transfer voice or video calls between devices using the alias numbers. Further, monitoring components in a home environment, for example, can be associated with one or more alias number so that security alerts can be provided to the various computing devices and computing appliances associated with the alias numbers.