Area code 878

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878 is an overlay area code for area codes 412 and 724 in south-western Pennsylvania centered in Pittsburgh. It came into effect on August 17, 2001, making 10-digit dialing mandatory in the 412 and 724 areas of western Pennsylvania.

As of May, 2007, there are no numbers assigned to area code 878, as number-conserving policies put into place at the time of its introduction have so far been successful.

[edit] See also

Commonwealth of Pennsylvania Area Codes: 215, 267, 412, 484, 570, 610, 717, 724, 814, 835, 878
North: 814
West: 330/234 and 304 Area code 878, is an overlay on 724, which surrounds 412/724 East: 814
South: 304
State of Ohio area codes: 216, 234, 330, 419, 440, 513, 567, 614, 740, 937
State of West Virginia Area Code: 304