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840 Area Code

Major City:San Bernardino
Current Time:

History of area code 840

840 was first put in service February 23, 2021. It was created from area code 909.

Where is area code 840

Area code 840 serves San Bernardino, CA and the surrounding areas. It is an overlay for area code 909 and serves the same area.

What time zone is area code 840?

The 840 area code is located in the Pacific timezone. The Pacific time zone is also known as America/Los_Angeles

area code 840

840 area code map

Top 2 Counties in Area Code 840

CountyTotal Population% of 840% of County
Los Angeles, CA9,818,60511%3%
San Bernardino, CA2,035,21086%6%

Top 38 Cities in Area Code 840

CityTotal Population% of 840% of City
San Bernardino, CA209,9244%100%
Fontana, CA196,0693%98%
Rancho Cucamonga, CA165,2693%100%
Ontario, CA163,9243%100%
Pomona, CA149,0582%100%
Rialto, CA99,1712%98%
Chino, CA77,9832%100%
Upland, CA73,7321%100%
Chino Hills, CA74,7993%96%
Redlands, CA68,7473%100%
Diamond Bar, CA55,5441%100%
Highland, CA53,1041%100%
Yucaipa, CA51,3672%100%
Colton, CA52,1541%96%
Montclair, CA36,6640%100%
Claremont, CA34,9261%100%
La Verne, CA31,0631%100%
San Dimas, CA33,3711%88%
Walnut, CA29,1721%84%
Loma Linda, CA23,2611%100%
Bloomington, CA23,8510%93%
Lake Arrowhead, CA12,4241%100%
Big Bear City, CA12,3042%100%
Grand Terrace, CA12,0400%100%
Rowland Heights, CA48,9930%23%
Crestline, CA10,7701%100%
Muscoy, CA10,6440%100%
Mentone, CA8,7200%100%
Calimesa, CA7,8791%100%
Eastvale, CA53,6680%10%
Big Bear Lake, CA5,0190%100%
Running Springs, CA4,8620%100%
San Antonio Heights, CA3,3710%100%
Beaumont, CA36,8770%6%
Highgrove, CA3,9880%28%
Lytle Creek, CA7010%100%
Oak Glen, CA6381%100%
Industry, CA2190%26%

Largest Landline Carriers in area code840


Largest Wireless Carriers in area code840


Prefixes in area code840

PrefixUsagePrimary CityCarrierIntroduced