   Area code +33 1 is Paris, France. (France is telephone country code  +33, and … Paris's area code 01 becomes +33 1 in international  format.)   Many other countries have domestic telephone area codes 331 or  similar.aris is area code 1; area codes 2, 3, 4, and 5 are for the northwest, northeast, southeast, and southwest parts of the country, respective … ly; and area codes 6 and 7 are for mobiles.