List_of_postal_codes_in_Peru
A Peruvian postal code (Peruvian Spanish: codigo postal) is a five-digit string that comprises part of a postal address in Peru. Prior to 2011, only the major cities of Lima and Callao used postal codes. However, in February 2011 a nationwide system was implemented which employs a five-digit numeric format. Similar to the postal codes of Mexico, Brazil, Australia, the United States, and elsewhere, postal codes in Peru are strictly numerical, using only numbers.
The first two digits of the postal code identify the administrative region or department, whereas the final two digits represents a specific district or location within a district. The middle digit does not strictly relate to specific provinces, therefore it is possible and indeed common for one province to be split amongst multiple postal zones.
For example, the province of Chachapoyas contains portions of postal zones 010, 012, 013 and 014 whereas postal zone 011 is entirely within Bongará Province. Regardless, it can be understood that all five postal zones are within the Department of Amazonas, since they all begin with the digits 01.
An online tool to search for postal codes can be found here.