ZIP Code 01803 is located in the county of Middlesex in the state of Massachusetts. 01803 ZIP Code is spread between the coordinates of +42.5075219 Latitude and -71.19913707 Longitude. 01803 ZIP Code is part of the 339, 781 area code. There is 1 postal office in zip code 01803.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 01803. 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.