The most populous cities in area code 646 are: New York.
Bronx, Kings (Brooklyn), New York (Manhattan), Queens, Richmond (Staten Island)The City of New York, often called New York City or simply New York, is the most populous city in the United States. With an estimated 2015 population of 8,550,405 distributed over a land area of about 302.6 square miles (784 km 2), New York City is also the most densely populated major city in the United States. Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, one of the most populous urban agglomerations in the world.
Bronx is the northernmost of the five boroughs of New York City, within the U.S. state of New York. It is geographically south of Westchester County ; north and east of the island and borough of Manhattan to the south and west across the Harlem River ; and north of the borough of Queens, across the East River. Of the five boroughs, the Bronx is the only one that has the majority of its area on the U.S. mainland and, with a land area of 42 square miles (109 km 2) and a population of 1,455,444 in 2015, has the fourth-largest land area, the fourth-highest population, and the third-highest population density.
Brooklyn is the most populous borough of New York City, with a Census-estimated 2,636,735 residents in 2015. It borders the borough of Queens at the southwestern end of Long Island. Since 1896, Brooklyn has had the same boundaries as Kings County, the most populous county in the U.S. state of New York, and the second-most densely populated county in the United States, after the county of New York (which is coextensive with the borough of Manhattan). With a land area of 71 square miles (180 km 2) and water area of 26 square miles (67 km 2), Kings County is New York's fourth-smallest county by land area and third-smallest by total area, though it is the second-largest among the city's five boroughs.
The 646 area code lies within the Eastern Daylight Time Zone (or EDT). The current time in EDT is 3:53 PM on Jul 11, 2020.