Montclair, CA Area Codes
Montclair is served by area codes 840 and 909. It is in California, San Bernardino County. About 37,700 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 840, 909 |
| State / province | California |
| County | San Bernardino County |
| Population | 37,700 |
| ZIP codes | 1 |
| Time zone | Pacific |
| Coordinates | 34.0721, -117.6983 |
What area code is Montclair in?
ZIP codes in the code footprint
Nearby towns and their area codes
Pomona 840, 909Claremont 840, 909Upland 840, 909Ontario 840, 909La Verne 840, 909San Dimas 840, 909Chino 840, 909Rancho Cucamonga 840, 909
How to dial
Dial 840 + 7 digits for a number in Montclair, or +1 840 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.