Telephone numbers in Indonesia have different systems for landlines and mobile phones: landlines use area codes, while mobile phones do not. For landline area codes, the digit "0" is added in front when dialing domestic long distance from within Indonesia, but is always omitted when calling from abroad. Instead, callers would use the Indonesian country code +62, followed by the area code, without the "0". To make a phone call to Indonesia from abroad via landlines, callers dial +62, followed by the area code and subscriber's number, omitting the ‘0’. For calls to mobile wireless phones (GSM) from abroad, callers dial +62, followed by the subscriber's number, omitting the '0'.