Mount Washington NH ZIP Code
Mount Washington city is located in New Hampshire State, Coos County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Mount Washington NH zip code by its streets and block numbers if we have some of the Mount Washington streets loaded in our website
Mount Washington Area Code is 603 and Time Zone is Eastern (GMT -05:00).
Mount Washington Zip Code - New Hampshire
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mount Washington City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mount Washington ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mount Washington, New Hampshire.
The Mount Washington Zip Code is 03589.
If you want to send a mail to Mount Washington City, you should use the 03589 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mount Washington 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 03589 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mount Washington 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 New Hampshire.