Area code 831 covers the coastal heart of central California, including Monterey, Santa Cruz, and Salinas. Created in 1998 from a split with 408, it spans farmland, redwood forests, and world-famous shoreline. The region is known for agriculture, marine science, and coastal tourism, anchored by historic Cannery Row and Big Sur. With ocean mist and earthy roots, 831 offers California’s quiet coastal soul.