707 Area Code

707 Area Code The 707 area code was created in 1959 when it split off the 415 area code. The 707 area code serves portions of Del Norte, Glenn, Humboldt, Lake, Marin, Mendocino, Napa, Solano, Sonoma, Tehama and Trinity Counties.   where is area code 707 The 707 area code serves the cities of American Canyon, … Read more