New Castle DE ZIP Code
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New Castle city is located in Delaware State, New Castle County and has a unique zip code assigned by the US Postal Service Office.
You can search for the New Castle DE zip code by its streets and block numbers if we have some of the New Castle streets loaded in our website
New Castle Area Code is 302 and Time Zone is Eastern (GMT -05:00).
New Castle Zip Code - Delaware
The US ZIP Code basic format consists of five decimal numerical digits assigned to the New Castle City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the New Castle ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in New Castle, Delaware.
The New Castle Zip Code is 19720, 19721, 19726.
If you want to send a mail to New Castle City, you should use the 19720, 19721, 19726 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded New Castle 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 19720, 19721, 19726 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a New Castle 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 Delaware.