The present invention relates to a parking system, which comprises: (a) plurality of Curb Devices for communication with car device and a host, each Curb Device having its own unique Curb Device ID and is installed close to a corresponding parking space; the Curb device is also provided with a sensor for sensing a physical positioning of a car within the respective parking space; (b) plurality of Car Devices, each Car Device is provided with its own unique Car Device ID, and is positioned at a corresponding car at a location which is visible from the outside; and (c) a Host which is provided with Users Data and Parking Spaces Data, for remotely managing, billing, enforcing and controlling on line and in real time parking of vehicles at each of said parking spaces. The invention also enables a driver of a car which is not provided with a car device to use a cellular alternative, where the driver uses his cellular phone to report to the Host the Curb Device ID, as visually displayed, while his phone number serves as a replacement for the Car Device ID. The invention also relates to a parking enforcement by the system of the present invention, which enforces parking in real time, while providing to the enforcement inspector the exact parking location where a proven violation has occurred.