It used to be that the back page of every phone book in the land had the full list of all zip codes for the state you lived in. Maine no different.
Not every part of the nation does that anymore...SOooooo..Here is a handy list state my state to get those pesky zip codes for obscure places to make sure what you mail gets there the first time. With rising postage, good to get a bulls eye everytime with your zip code selection! Don't guess anymore! Here the link!
http://en.wikipedia.org/wiki/List_of_ZIP_Codes_in_the_United_States 