Here you can look up zip codes used in the Philippines. You can both search for place names to find the matching zip code, and vice versa, look for a zip code and find the matching place.
The common formatting of a postal address in the Philippines is as follows:
Mr. Juan M. de la Cruz
123, Rizal Street
Poblacion, San Vicente
3456 Negros Occidental
However, in many rural areas, streetnames are not used, and thus will be omitted from the address.