Ralph SD ZIP Code
Ralph city is located in South Dakota State, Harding County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Ralph SD zip code by its streets and block numbers if we have some of the Ralph streets loaded in our website
Ralph Area Code is 605 and Time Zone is Mountain (GMT -07:00).
Ralph Zip Code - South Dakota
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Ralph City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Ralph ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Ralph, South Dakota.
The Ralph Zip Code is 57650.
If you want to send a mail to Ralph City, you should use the 57650 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Ralph 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 57650 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Ralph 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 South Dakota.