New Jersey United States ZIP Code 5 Plus 4 ✉️
The first five numbers continued to identify an area of the country and delivery office to which mail is directed. The last two numbers denoted a delivery segment, which might be one floor of an office building, one side of a street between intersecting streets, specific departments in a firm, or specific Post Office boxes. . The sixth and seventh numbers denoted a delivery sector, which may be several blocks, a group of streets, a group of Post Office boxes, several office buildings, a single high-rise office building, a large apartment building or a small geographic area. . . .
