Area code 878 is an overlay code for the 412 and 724 numbering plan areas in southwestern Pennsylvania, activated in 2001 to provide relief for number exhaustion in the region.
Area code 878 is an overlay code for the 412 and 724 numbering plan areas in southwestern Pennsylvania, activated in 2001 to provide relief for number exhaustion in the region.
NPA 878 to Overlay NPAs 412 and 724 (Pennsylvania)
Permissive 10-digit dialing begins for 412 and 724
Ten-digit dialing becomes mandatory in southwestern Pennsylvania
Rationing in NPAs 412, 724, and 878 (Pennsylvania)
Mandatory 10-digit dialing for 412 and 724
Area code 878 overlays 412
NPA 878 overlay implemented for 412 and 724
Mandatory ten-digit dialing begins in 412, 724, and 878 simultaneously
First telephone numbers assigned for area code 878 in 412 region
In 2013, telephone numbers were first assigned for area code 878 in the 412 region, more than a decade after the overlay was implemented.
Announcement to begin issuing 878 numbers in 724 territory
Announcement to start issuing 878 numbers in 724 territory
First 878 numbers issued in 724 territory in April 2013
First 878 numbers assigned in 724 territory
The first telephone numbers with area code 878 were assigned in the 724 territory in April 2013, nearly 12 years after the overlay was activated.
First telephone numbers assigned for area code 878 in 724 region
In 2015, telephone numbers were first assigned for area code 878 in the 724 region, completing the activation of the overlay across both 412 and 724.
First 878 central office prefix assigned in 412 territory
First 878 central office prefix assigned in 412 territory
The first 878 central office prefix (999) was assigned in the 412 territory on September 15, 2015, marking the start of 878 number assignments in Pittsburgh.