what is area code 609
Area code 609 serves telephones in southeastern and central New Jersey, including the cities of Trenton, Long Beach Island, Princeton, Hamilton and Atlantic City. In terms of geographic coverage, it is the largest in the state of New Jersey.In the original North American Number Plan (NANP), all of New Jersey was served by area code 201, until it was split in 1958 to create area 609.he boundary was drawn in such a way so that several towns were split between area codes. Some prefixes assigned to mobile phone providers that lie within the 856 territory have never had their area code changed; thus 609 serves as a de facto partial overlay of 856, although it is rarely acknowledged as such.