Area code 840
Area code 840 is a telephone area code in the North American Numbering Plan. It serves California, the United States.
- 840area code
- CACalifornia
- UScountry
- 23-Feb-21in service
How to dial a 840 number
From within the United States and Canada, dial 1, then 840, then the seven-digit number. From another country, dial your international access code, then +1 840 and the seven-digit number.
Area code 840 covers the same territory as 909. When several area codes share one area like this, it is called an overlay.
Other area codes in California
209, 213, 279, 310, 323, 341, 350, 357, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 858, 909, 916, 925, 949, 951
Frequently asked questions
Where is area code 840?
Area code 840 serves California, the United States.
What is the country code for a 840 number?
Numbers with North American area codes use the country calling code +1.