Massachusetts (Massachusetts) is in the northeastern part of the United States, close to the Atlantic Ocean, so the state has a winding coastline and many excellent harbors. The main port is Boston. Meanwhile, the state's main airport is Boston Logan International Airport (BOS). It covers an area of 21,000 square kilometers and has a population of 6.902 million as of 2018. The postal code (ZIP) of Boston, the main city in Massachusetts, is: 02101, 02102, 02103, 02104, 02105, 02106, 02107, 02108, 02109, 02110, 02111, 02112, 02113, 02114, 02115, 02116, 02117, 02118, 02 , 02120, 02121, 0212, 0212, 02127, 02128, 02133, 02163, 02196, 02199, 02201, 02203, 02204, 02205, 02206, 02207, 02208, 02212, 02210, 02211, 02212, 02215, 02216 , 02217, 02222, 02241, 02266, 02283, 02284, 02293, 02295, 02297.