ZIP codes are numbers that are used to identify the geographic location of a certain address. They go from 0 to nine, with the first digit representing the region of the United States. For example, the "0" zone is the Northeast U.S., which includes New York, Pennsylvania, and New Jersey. The "2" and "3" zones include Florida and Georgia. The "4" and '5' zones are in the American Midwest and Southern states. The "7" and '8' zones include Texas and Arkansas, and the last two are in the Western United States.
For instance, a nine-digit zip code can represent a city, town, or county. For example, the zip code for a small city in New Jersey contains the city of Pittsburgh. A large city has multiple ZIP codes for each location. For example, a large metro area in Philadelphia might contain hundreds of zip codes. But how many different zip codes are there in each region? These numbers are often called'shopping center' zip codes.
Another type of ZIP code uses nine digits. There is no possibility of a nine-digit ZIP code starting with '0'. For example, a two-digit numeric code would have one digit repeated twice. For example, 10*9*8*7*6=30240. A two-character alphanumeric code, on the other hand, represents 900 locations. Similarly, a twenty-digit zip code would contain ten numbers and twenty letters.
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