Diamond Bar, CA Area Codes
Diamond Bar is served by area codes 840 and 909. It is in California, Los Angeles County. About 44,502 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 840, 909 |
| State / province | California |
| County | Los Angeles County |
| Population | 44,502 |
| ZIP codes | 1 |
| Time zone | Pacific |
| Coordinates | 33.9852, -117.8120 |
What area code is Diamond Bar in?
ZIP codes in the code footprint
Nearby towns and their area codes
Brea 657, 714Pomona 840, 909Yorba Linda 657, 714Placentia 657, 714West Covina 626Covina 626San Dimas 840, 909Chino 840, 909
How to dial
Dial 840 + 7 digits for a number in Diamond Bar, or +1 840 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.