To dream of a zip code represents a label or designation you have of a person or situation. Psychological grouping or organization. Something is a part of “all of this” or “all of that.” It may also reflect how good or bad something is.
Example: A person once dreamed of getting a job sorting mail by zip code. In real life they were interpreting dreams in their spare time. The sorting of the mail by zip code reflected their attempt to tell each person if their dream was positive or negative.
Refer to the themes section for numbers for a more in depth look at dream number symbolism.