Allentown PA ZIP Code
Allentown city is located in Pennsylvania State, Lehigh County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Allentown PA zip code by its streets and block numbers if we have some of the Allentown streets loaded in our website
Allentown Area Code is 610 and Time Zone is Eastern (GMT -05:00).
Allentown Zip Code - Pennsylvania
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Allentown City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Allentown ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Allentown, Pennsylvania.
The Allentown Zip Code is 18101, 18102, 18103, 18104, 18105, 18106, 18109, 18195.
If you want to send a mail to Allentown City, you should use the 18101, 18102, 18103, 18104, 18105, 18106, 18109, 18195 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Allentown 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 18101, 18102, 18103, 18104, 18105, 18106, 18109, 18195 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Allentown 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 Pennsylvania.