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 424 and exchange code 277 is assigned to LOS ANGELES. The latitude and longitude corresponding to 33.918344743728 and -118.416444228346 can be used to find an area on the map. Level 3 Communications LLC - CAoperates most of the land lines in United States.