Haddam CT ZIP Code
Haddam city is located in Connecticut State, Middlesex County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Haddam CT zip code by its streets and block numbers if we have some of the Haddam streets loaded in our website
Haddam Area Code is 860 and Time Zone is Eastern (GMT -05:00).
Haddam Zip Code - Connecticut
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Haddam City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Haddam ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Haddam, Connecticut.
The Haddam Zip Code is 06438.
If you want to send a mail to Haddam City, you should use the 06438 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Haddam 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 06438 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Haddam 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.