Area code and exchange code is assigned to every constituent of city in the United States. The area and exchange codes of the telephone can be used to find information about a region. Area code 914 and exchange code 233 is assigned to Yonkers. The latitude and longitude corresponding to 40.94 and -73.87 can be used to find an area on the map. Mci Metro Ats, Inc. - Nyoperates most of the land lines in United States.