Area code 708, Telephone prefix in Chicago suburbs, United States.
Area code 708 is a telephone prefix covering southern and western Cook County, linking towns such as Oak Park, Berwyn and Chicago Heights. It reaches across roughly sixty municipalities in the Chicago metro region, serving several hundred thousand residents.
The prefix was born in 1989 from a split of area code 312 to meet growing demand for telephone numbers in the suburbs. Seven years later, the territory was divided again when codes 847 and 630 were introduced to cover additional parts of the metro area.
The telephone area represents diverse communities within the Chicago metropolitan region, connecting residents across sixty different municipalities.
All calls within the region require ten-digit dialing since October 2021, even for local connections within the same prefix. The change occurred alongside the nationwide rollout of the mental health emergency number, which mandates uniform formatting.
Since January 2022, the prefix shares its territory with the additional code 464, introduced through an overlay system. This solution allows existing numbers to remain unchanged while providing new connections for the growing population.
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