| Area Codes in the United States are determined largely by the
density of telephones in a given area. Some large metropolitan areas have
several Area Codes, while sparsely populated states may have only one Area Code.
A recent innovation in the USA has been
that of the area code overlay scheme. Whereby city/area codes were
traditionally assigned in a linear geographic
fashion, the overlay method implemented in the late 1990s has made it
possible for numerous area codes to co-exist in the same region.
This system has been employed in several metropolitan areas in the US
and is also used in the Toronto area of
Eastern Canada. Unfortunately, the use of overlays can make the
task of discerning a particular code used in a certain city or area more
difficult.
The Area
Codes in use are too numerous to list here, and codes are changed or added regularly.
Areas scheduled for or undergoing changes can be found at http://areacode-info.com/.
The
links below can help you find an Area Code or phone listing for a particular city or state. |