The country code and area code of Arequipa, Peru is 51, (0)54.
I think it's 54
The country code and area code of Piura, Peru is 51, (0)73.
The country code and area code of Ancash, Peru is 51, (0)43.
The country code and area code of Cajamarca, Peru is 51, (0)76.
The country code and area code of Huancavelica, Peru is 51, (0)67.
The country code and area code of Ica, Peru is 51, (0)56.
The country code and area code of Lambayeque, Peru is 51, (0)74.
The country code and area code of Loreto, Peru is 51, (0)65.
The country code and area code of Moquegua, Peru is 51, (0)53.
The country code and area code of Pasco, Peru is 51, (0)63.
The country code and area code of Tumbes, Peru is 51, (0)72.
The country code and area code of Ucayali, Peru is 51, (0)61.