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7 = Arkansas, Louisiana, Oklahoma, Texas.
![us zip code number us zip code number](https://d22blwhp6neszm.cloudfront.net/32/312215/ss-zc-gold.png)
6 = Illinois, Kansas, Missouri, Nebraska.5 = Iowa, Minnesota, Montana, North Dakota, South Dakota, Wisconsin.
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Us zip code number full#
Here's the full list with states: 02861 Massachusetts So your example of 42223 does span a state border, but it looks like it is actually between Maryland and Virginia. There are 13 multi-state US Census' ZIP Code Tabulation Areas (ZCTAs): 02861, 42223, 59221, 63673, 71749, 73949, 81137, 84536, 86044, 86515, 88063, 89439 & 97635.Īs others have mentioned, there are a few different ways to figure out the area covered by a ZIP Code, but ZCTAs are the easiest, and the only official version that I know of.