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It is preferred that all City, State, and ZIP Code information be on a single line. If that is not possible, the ZIP Code, including the ZIP+4 Code, may be placed below the city/state information.

Census tracts have well known/exact boundaries. ZIP codes are groups of lines whose exact structural definition is not officially established.

Search for a location or zoom in on the map until you can see the area you want to see zip codes for. In the map legend, click the "Zoom to area" button. Type in the zip code you want to see in the search box and press Enter. Google Maps will zoom in on the area and highlight the boundary of the zip code.

These last 4 digits represent specific delivery routes within delivery areas. This extra detail means an even more precise matching to a more granular level. It could represent a handful of houses on one side of a street, or even a single building that receives a high volume of mail.

Data scientists should know that ZIP codes do not always fall within state boundaries (or even of the borders of states within a zone). There are over 100 cases where ZIP codes cross state lines.

Release Zip creates single zip package from multiple projects in Solutions. The content of the zip package is defined by json configuration file in the project, thus allow full control of zip structure.

This is because ZIP code boundaries are based on mail routes and delivery points rather than geographic factors. The U.S. Post Office Department, predecessor to USPS, developed a zoning address system in 1943 as a way to make sorting and delivery of mail easier.