Area Code 650 Location

Area code 650 serves Daly City, California, at the northern edge of the San Francisco Peninsula in San Mateo County. Daly City borders San Francisco and is often called the “Gateway to the Peninsula,” linking coastal neighborhoods to the tech corridor farther south. The 650 area spans from oceanfront towns to Silicon Valley communities in northwestern Santa Clara County, covering everyday phone numbers for homes, schools, and businesses. It’s a practical code with a wide reach in one of California’s most connected regions.

Major cities and landmarks in the 650 area code include:

• Daly City — the Cow Palace arena and classic Westlake district
• South San Francisco — Oyster Point waterfront
• San Bruno, Millbrae, Burlingame — near San Francisco International Airport (SFO)
• Pacifica — coastal beaches and cliffs
• San Mateo, Foster City — bayfront parks and levee trails
• Belmont, San Carlos, Redwood City — mid-Peninsula hubs
• Menlo Park, Atherton, East Palo Alto — southern Peninsula communities
• Palo Alto, Stanford — home to Stanford University
• Mountain View, Los Altos, Los Altos Hills — Silicon Valley doorstep and Shoreline Park
• Half Moon Bay — Highway 1 coastline and Mavericks surf spot
• Woodside, Portola Valley — redwood canyons and open space preserves

“Area code 650 was created on August 2, 1997, in a split from 415.” — North American Numbering Plan Administration (NANPA)

Established in 1997, 650 primarily serves San Mateo County and a small portion of Santa Clara County, including Palo Alto, Mountain View, and Los Altos. The region runs on Pacific Time and includes both Highway 1 along the coast and the U.S. 101 tech corridor. SFO sits in San Mateo County within the 650 service area, making 650 numbers common for airlines, travel, and airport services. When you see a 650 phone number, it usually points to the Peninsula from Daly City down through Redwood City, Menlo Park, and nearby coastal towns.