20878-1773 Zip Code
20878-1773 Zip Code is a 'Zip Code 5 Plus 4' zip code type in the state of Maryland, Gaithersburg City. This Zip Code is assigned to a street address number or a street address range in Gaithersburg, MD - US.
20878-1773 Area Code is 301/240 and Time Zone is Eastern (GMT -05:00).
Remember you have 2 kinds of blocks: even or odd. In this case, this Zip Code is assigned to Odd numbers in the corresponding block(s)
20878-1773 ZIP Code 5 Plus 4
The U.S. Postal Service introduced an expanded ZIP code system in Gaithersburg named ZIP Code 5 Plus 4, often called "add-on codes" or "add ons" zip code. A ZIP Plus Four Code (ZIP+4) uses the basic Gaithersburg Zip code (20878) plus four additional digits (1773) to identify a geographic segment within the five-digit delivery area, such as a the Firstfield RD street 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 Maryland.
The zip code 20878-1773, applies to residential houses, business, buildings, and every Gaithersburg City properties with Odd numeration buildings in this range:
17B - 17B Firstfield RD, Gaithersburg, Maryland - US