GSM zone

The area in which a specific 4-digit zone code can be used to pay for parking by mobile phone.

GSM code

This is the code that parkers must select when they want to park in the vicinity of this parking meter.
This code is constructed as "51"+ the first 2 digits of the machine number

Tariff code

The tariff code indicates which tariff applies
(in accordance with the tariff table from the Parking Taxes Regulation)