For the wine region, see Napa Valley AVA. Napa County is a county located north of San Pablo Bay in the northern portion of the U.S. state of California. As of the 2010 census, the population was 136,484. The county seat is the City of Napa. Napa County was one of the original counties of California, created in 1850 at the time of statehood.
Area code 412 is a Pennsylvania area code that covers Pittsburgh and some of the surrounding areas. Area code 412 overlays the area code of 878. Pennsylvania has area codes of 215, 267, 272, 412, 484, 570, 610, 717, 724, 814, 878.
The 416 area code has been split twice. The western portion of 416 (including Kitchener) and the northern portion of 613 were assigned area code 519 in 1953. Despite the Greater Toronto Area 's rapid growth, this configuration remained for 40 years.rea codes 416, 647, and 437 are telephone area codes serving the single rate centre of Toronto, Ontario, Canada. The incumbent local exchange carrier in the 416/647/437 territory is Bell Canada.