<P> Area code 202 is the North American telephone area code for Washington, D.C. . The area code was one of the original area codes established in October 1947 by AT&T in the North American Numbering Plan (NANP). </P> <P> After the State of New Jersey with area code 201, the District of Columbia was the second Numbering Plan Area (NPA). NPAs that covered an entire administrative region received a code in which the second digit was' 0' . </P>

What is the area code of washington dc