Block Out Zip Code Log For Free

ZCTAs or ZIP Code Tabulation Areas were created by the U.S. Census Bureau and are generalized representations of ZIP Codes that have been assigned to census blocks. Therefore, ZCTAs are representative of geographic locations of populated areas. In most cases, the ZCTA will be the same as its ZIP Code.

ZIP codes have nothing to do with the lines that define a county. One ZIP code could include addresses in multiple counties and a single county might include hundreds of ZIPs!

There are over 100 cases where ZIP codes cross state lines. Even if ZIP codes could be plotted with well-defined boundaries, these would not align with other political boundaries such as county or municipal borders. And ZIP codes certainly do not align with United States Census tracks, block groups, or blocks.

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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.

The four extra numbers are added after a hyphen to complete the ZIP+4. So what do the extra numbers mean? 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.

ZIP Codes are numbered with the first digit representing a certain group of U.S. states, the second and third digits together representing a region in that group (or perhaps a large city) and the fourth and fifth digits representing a group of delivery addresses within that region.

Not Always. When looking at postal codes around the world, there are cases where two different cities are served by the same postal code. For example, the zip code 94608 in California is used for both Emeryville and parts of Oakland. One postal code, two cities.

Demographic data refer to the Decennial Census and other surveys of individuals and households administered by the Census Bureau.Access to these data will only be granted to qualified researchers on approved projects with authorization to use specific data sets.

Yes.. Unless you don't want them to know what town/city you live in. If that is a concern just pick any town you like, visited, and give them that zip code. Some stores want your zipcode so they can see how big of a drawing area they have.