Similarly, areas without regular postal routes rural route areas or areas with no mail delivery undeveloped areas , are not assigned ZIP Codes. They are based on sparse delivery routes, so the boundary between ZIP Code areas there is indefinite. You can see our instructions on how to find a county by ZIP Code. The full ZIP Code identifies a small delivery segment such as a street, a city block, a group of apartments, or even an individual address that receives a high volume of mail.
Even though the USPS might not provide accurate geocodes for those addresses, Smarty can still provide roof-top level geocodes for most addresses in the US. SmartyStreets is now. Arrow Icon Documentation.
Choose your option below. Enter a city and state to see the ZIP Codes for that city. Every PIN code features the same format, with the first digit communicating the respective region, the second indicating the sub-region and the third narrowing things further to the specific district of the sub-region. The remaining three digits of the PIN code detail the individual postal address within the respective district.
This standardised postal address numbering system used by Indian Postal Services was introduced to simplify and accelerate everyday mail delivery processes. Rolled out nationwide in August , the system is essentially quite similar to the Zip Codes of the United States or the Postcodes of the United Kingdom. Country Area Locator. You can easily notice some of the boundary issues when viewing our maps. Very rural areas aren't labeled as belonging to a ZIP code such as much of Nevada and Utah where there are few, if any, addresses to deliver mail.
If the address is on the same street as a ZIP code boundary on the map, be sure to search for the full street address to determine the ZIP code instead of relying on the map. Their purpose is to convey statistical data about regions that are familiar to most citizens. As discussed above, it is difficult to precisely define a geographic area covered by a ZIP code. ZCTAs were developed to account for some of the difficulties in assigning an area to a ZIP code and to precisely define a geographic area.
In general, they are updated once every 10 years for the Census. The Census assigns an area to a ZCTA according to census blocks the smallest geographic unit used by the census. Imagine a city block that makes up a typical census block as pictured to the right. It is bounded on all 4 sides by portions of city streets that each have their own name and addresses.
The issue is that census blocks almost always split down the middle of the street. ZIP codes rarely do because that would require two postal workers delivering mail to that street - one for each side of the street. In the example, one mail carrier may deliver to 3 sides of the block via one ZIP code while another mail carrier delivers mail on the other street in a different ZIP code.
When this happens, the Census Bureau will assign the entire block to a single ZCTA in this case, because the census block is the area that is precisely measured. If you are getting very precise usually a matter of meters, not miles , census block boundaries near the edge of a ZIP code almost always split ZIP codes.
The statistics provided by the Census Bureau can give insight into the demographics within the ZIP code. For instance, see our ZIP code rankings.
Remember that ZIP codes were made to make mail delivery easier.
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