ZIP Code 18103 is located in the county of Lehigh in the state of Pennsylvania. 18103 ZIP Code is spread between the coordinates of +40.5777651 Latitude and -75.47459807 Longitude. 18103 ZIP Code is part of the 484, 61 area code. There is 1 postal office in zip code 18103.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 18103. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.