To call RingGo from abroad, simply prefix the regular RingGo parking number with +44 to include the international dialling code for the United Kingdom, and drop the initial zero. For example, 020 3046 0010 will become +44 20 3046 0010. Note the plus sign (+) is used to access the international telephone network. Most mobile phones allow you to key this in. If calling from a landline abroad, you'll need to replace the plus sign (+) with the international access code for the country you're in. For most European countries, this is 00.