011 + 8 digits for numbers in Buenos Aires city and part of Greater Buenos Aires.02 + Area Code (2 or 3 digits) + Subscriber Number (7 or 6 digits) for numbers in southern provinces under Telefónica de Argentina. 03 + Area Code (2 or 3 digits) + Subscriber Number (7 or 6 digits) for numbers in northern provinces under Telecom Argentina.