Old Greenwich CT ZIP Code
Old Greenwich city is located in Connecticut State, Fairfield County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Old Greenwich CT zip code by its streets and block numbers if we have some of the Old Greenwich streets loaded in our website
Old Greenwich Area Code is 203 and Time Zone is Eastern (GMT -05:00).
Old Greenwich Zip Code - Connecticut
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Old Greenwich City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Old Greenwich ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Old Greenwich, Connecticut.
The Old Greenwich Zip Code is 06870.
If you want to send a mail to Old Greenwich City, you should use the 06870 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Old Greenwich 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 06870 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Old Greenwich 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 Connecticut.