Alton IA ZIP Code

Alton city is located in Iowa State, Sioux County and has a unique zip code assigned by the US Postal Service Office.


You can search for the Alton IA zip code by its streets and block numbers if we have some of the Alton streets loaded in our website

Alton Area Code is 712 and Time Zone is Central (GMT -06:00).



Alton Zip Code - Iowa

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Alton City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Alton ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Alton, Iowa.

The Alton Zip Code is 51003.



If you want to send a mail to Alton City, you should use the 51003 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Alton ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 51003 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Alton city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Iowa.


Alton, Iowa - MAP



What is the Alton Zip Code?

The Alton Zip Code in Iowa is 51003.


ZIP Plus 4 Alton - US Streets Zip Codes

By pressing keys ctrol + F you can search Alton zip codes by its streets, highways, and know the ZIP+4 US ZIP Code




Search Alton Zip Code

What is the zip code for Alton IA?

51003

Alton, Iowa - US Zip Code



Alton ZIP Code Lookup

51003 Zip Code File:
Zip Code: 51003,
City: Alton
Alton Area Code: 712
Alton, IA - Time Zone: Central (GMT -06:00)
County: Sioux
City Alias: Carnes, Alton
State: Iowa
State Abb: IA



Iowa Zip+4 - Nearby Alton Cities

Cities near Alton in Iowa
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