Guilford CT ZIP Code
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Guilford city is located in Connecticut State, New Haven County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Guilford CT zip code by its streets and block numbers if we have some of the Guilford streets loaded in our website
Guilford Area Code is 203 and Time Zone is Eastern (GMT -05:00).
Guilford Zip Code - Connecticut
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Guilford City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Guilford ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Guilford, Connecticut.
The Guilford Zip Code is 06437.
If you want to send a mail to Guilford City, you should use the 06437 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Guilford 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 06437 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Guilford 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.