Area Coe 856 is an area code in the U.S. state of New Jersey created in 1999 by a split of area code 609. It covers southwestern New Jersey, in particular the Camden/Cherry Hill and Vineland areas, as well as a very small part of Willingboro Township, along with the western part of Burlington County, while 609 covers the rest of Willingboro and the areas to the north and east. Essentially, 856 covers the areas directly adjacent to Philadelphia. The coverage area is comprised of the eastern suburbs of Philadelphia. In that sense, 856 very much mirrors area code 201, which directly abuts New York City in the northern part of the state.