Area Code 840

California (CA) • San Bernardino, Rancho Cucamonga, Fontana, Ontario, Pomona, Chino, Loma Linda, Redlands • Pacific Time (PT)

What Stands Out

•Coverage: 2.1M people across 65 ZIP codes (primarily San Bernardino County, CA).
•Overlapping area codes: 909.
•Major cities: San Bernardino, Rancho Cucamonga, Fontana.

Spotlight: Coverage

Snapshot highlights for area code 840.

Income

79th

Home values

91st

Poverty rate

56th

Area Code Basics

Primary State

California (CA)

States Served

California (CA)

Major Cities

San Bernardino, Rancho Cucamonga, Fontana, Ontario, Pomona, Chino, Loma Linda, Redlands

Time Zone(s)

Pacific Time (PT)

Est. Population

2.1M

ZIP Codes

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area-code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.