<Tr> <Th> ZIP code (s) </Th> <Td> 20001 - 20098, 20201 - 20599 </Td> </Tr> <Tr> <Th> Area code (s) </Th> <Td> 202 </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.dc.gov </Td> </Tr> <P> Washington, D.C., formally the District of Columbia and commonly referred to as "Washington", "the District", or simply "D.C.", is the capital of the United States . </P>

Washington is not a part of the usa