Abstract: Disclosed procedures automatically identify a carrier-authorized mobile station and verify an account related identifier associated with the device, in response to start-up of an application in the device. Application start-up causes the device to send a request to an application server, with the device's current IP address, MTN and a device identifier such as MEID or ESN. The server queries an AAA system of the network to retrieve the MTN that has been assigned the IP address. If the retrieved MTN matches the MTN passed to the server in the request, the server queries a network database such as DMD for the device identifier associated with the MTN. A match of the device identifier retrieved from the network database with that passed to the server via the request indicates authenticity of the requesting device and its MTN.