When it comes to what is zip code america, there is a lot more to them than just mail sorting. They are used to track and display demographic information and even help with online searches, allowing users to limit their search results by geography (e.g., store locators). Some of these codes have become famous in their own right, such as 90210 (the famous Beverly Hills zip code made popular from the hit TV show of the same name).
Though many people associate them with a specific geographic area, ZIP Codes are not actually designed to represent regions. Instead, they denote address groups or routes, and as a result, ZIP Code "areas" can overlap, be contained within another, or have no geographic area at all (e.g., the 095 postal codes assigned to Navy facilities have no geographical area).
As a result of these limitations, it is common for people to have different preferred place names than what their ZIP Codes indicate. For example, people may prefer to use the name of their city rather than that of a neighboring town or suburb, and in some cases this can cause confusion and even conflict with local government authorities.
Although ZIP Codes were originally devised to help the Postal Service sort mail, they have become much more widely used by other organizations, including other shipping companies like UPS and FedEx. In addition, data aggregators like Data Axle Reference Solutions, Hoover's Relationship Manager, and SimplyAnalytics also collect ZIP Code-based demographic information, and government agencies produce statistical reports using such information.