840 Area Code

Where is area code 840?

Area code 840 is located in San Bernardino / Riverside (overlay), California. It covers San Bernardino, Riverside, and surrounding areas in the Pacific time zone (UTC-8).

Cities Covered by Area Code 840

Area code 840 primarily serves the San Bernardino / Riverside (overlay) area of California. The exact coverage includes San Bernardino, Riverside, and Ontario, along with surrounding communities and suburbs.

Time Zone

Pacific Time — UTC-8

Area code 840 operates in the Pacific Time Zone. When calling 840 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.

About Area Code 840

Area code 840 was introduced in 2022 as a geographic area code serving San Bernardino / Riverside (overlay), California. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.