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840 Area CodeSan Bernardino, CA

Area code 840 covers San Bernardino and 37 other cities in California: 2,007,311 people in 3 counties, led by San Bernardino and Los Angeles, on Pacific Time (PT). It overlays 909.

Overview

Major City
San Bernardino
State
California (CA)
Timezone
Pacific Time (PT)
Current Time
–:––
Overlay
Yes – shares area with 909

Nearby Area Codes

Where is area code 840?

Overview of the 840 Area Code

Geographic Coverage of the 840 Area Code

All 38 cities

San Bernardino Area Codes Overview

What cities does area code 840 cover?

CityStatePopulationPopulation in 840% of listed-city population% of City
San BernardinoCA224,775224,77510.8%100.0%
FontanaCA218,455218,45510.5%100.0%
OntarioCA185,285185,2858.9%100.0%
Rancho CucamongaCA176,675176,6758.5%100.0%
PomonaCA147,966147,9667.1%100.0%
RialtoCA104,918104,9185.0%100.0%
ChinoCA94,01094,0104.5%100.0%
UplandCA79,68479,6843.8%100.0%
Chino HillsCA77,41877,4183.7%100.0%
RedlandsCA74,27974,2793.6%100.0%
EastvaleCA70,7517,6193.4%10.8%
BeaumontCA59,50217,6632.9%29.7%
HighlandCA56,49956,4992.7%100.0%
YucaipaCA54,46554,4652.6%100.0%
ColtonCA53,52853,5282.6%100.0%
Diamond BarCA52,29252,2922.5%100.0%
Rowland HeightsCA48,99316,3452.3%33.4%
MontclairCA37,65037,6501.8%100.0%
ClaremontCA36,13936,1391.7%100.0%
San DimasCA33,22627,3611.6%82.3%
La VerneCA30,19230,1921.4%100.0%
WalnutCA27,25020,2511.3%74.3%
Loma LindaCA25,19725,1971.2%100.0%
BloomingtonCA23,85123,8511.1%100.0%
Grand TerraceCA12,97912,9790.6%100.0%
Lake ArrowheadCA12,42412,4240.6%100.0%
Big Bear CityCA12,30412,3040.6%100.0%
CalimesaCA11,15011,1500.5%100.0%
CrestlineCA10,77010,7700.5%100.0%
MuscoyCA10,64410,6440.5%100.0%
MentoneCA8,7208,7200.4%100.0%
Big Bear LakeCA5,0445,0440.2%100.0%
Running SpringsCA4,8624,8620.2%100.0%
HighgroveCA3,98800.2%0.0%
San Antonio HeightsCA3,3713,3710.2%100.0%
Lytle CreekCA7017010.0%100.0%
Oak GlenCA6386380.0%100.0%
IndustryCA25600.0%0.0%

City population is shown in full; each city's share inside 840 is measured from Census tract centroids.

What counties does area code 840 cover?

CountyStatePopulation in 840% of area-code footprint% of County
San Bernardino CountyCA1,628,91281%75%
Los Angeles CountyCA344,21917%3%
Riverside CountyCA34,1802%1%
Sources:

Has area code 840 been reported for unwanted calls?

Yes – 544 FTC complaints, May 29 – Oct 1, 2026.

  • 75% robocalls
  • ↑ 78% vs prior period
  • FTC data, retrieved 2026-10-05

Most-reported subjects

  • Other37%202
  • Reducing your debt (credit cards, mortgage, student loans)35%192
  • Calls pretending to be government, businesses, or family and friends15%82

Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints.

Which prefixes and exchanges belong to area code 840?

6% assigned to a telco

  • 64% Landline
  • 36% Wireless
  • 0% Unknown
PrefixUsageCarrier
(840)200-LandlineFractel
(840)201-WirelessNew Cingular Wireless Pcs
(840)202-WirelessNew Cingular Wireless Pcs
(840)203-WirelessNew Cingular Wireless Pcs
(840)204-WirelessNew Cingular Wireless Pcs
(840)205-LandlineBandwidth.Com Clec
(840)206-WirelessNew Cingular Wireless Pcs
(840)207-WirelessT-Mobile Usa
(840)208-LandlineBandwidth.Com Clec
(840)209-WirelessT-Mobile Usa
(840)210-WirelessT-Mobile Usa
(840)212-WirelessT-Mobile Usa
(840)213-WirelessT-Mobile Usa
(840)214-WirelessT-Mobile Usa
(840)215-WirelessT-Mobile Usa
(840)216-WirelessT-Mobile Usa
(840)217-WirelessT-Mobile Usa
(840)218-WirelessVerizon Wireless
(840)219-WirelessT-Mobile Usa
(840)220-LandlineBandwidth.Com Clec
(840)221-LandlineHd Carrier
(840)222-LandlineFractel
(840)223-LandlineBandwidth.Com Clec
(840)224-WirelessNew Cingular Wireless Pcs
(840)225-WirelessNew Cingular Wireless Pcs
(840)228-WirelessVerizon Wireless
(840)229-WirelessVerizon Wireless
(840)234-LandlineFractel
(840)240-LandlineOnvoy
(840)252-WirelessT-Mobile Usa
(840)300-LandlineFractel
(840)333-LandlineFractel
(840)336-LandlineFractel
(840)345-LandlineFractel
(840)356-LandlineFractel
(840)400-LandlineFractel
(840)444-LandlineFractel
(840)465-LandlineFractel
(840)466-LandlineTon80 Communications
(840)500-LandlineFractel
(840)587-LandlineFractel
(840)588-LandlineFractel
(840)600-LandlineFractel
(840)666-LandlineFractel
(840)677-LandlineFractel
(840)688-LandlineFractel
(840)699-LandlineFractel
(840)777-LandlineTerra Nova Telecom
(840)788-LandlineFractel
(840)799-LandlineFractel
(840)800-LandlineFractel
(840)804-LandlineOnvoy
(840)837-LandlineTon80 Communications
(840)877-LandlineFractel
(840)888-LandlineTerra Nova Telecom
(840)899-LandlineFractel
(840)900-LandlineFractel
(840)977-LandlineFractel
(840)999-LandlineTerra Nova Telecom

Frequently Asked Questions about the 840 Area Code

Who called me from a 840 number?

36% of its assigned prefixes are wireless. Largest holders: Fractel, T-Mobile Usa, and New Cingular Wireless Pcs.

Is 840 a scam area code?

Carriers hold 6% of its possible prefixes.

Why do I keep getting calls from the 840 area code?

Complaints rose 78% on the prior period.

Should I answer an unknown 840 number?

75% of its FTC complaints were robocalls. Its most-reported specific subject was "Reducing your debt (credit cards, mortgage, student loans)", at 35%.

How do I block calls from the 840 area code?

Blocking 840 still lets 909 numbers through.

Where is area code 840?

840 covers 38 cities and 2,007,311 residents in 3 California counties, led by San Bernardino, Los Angeles, and Riverside.

When did area code 840 go into service?

840 went into service on February 23, 2021. It was added to overlay 909.

Is 840 a real area code?

Yes: 9 carriers hold its prefixes, serving 38 cities in San Bernardino, Los Angeles, and Riverside counties.

What timezone is the 840 area code in?

840 is on Pacific Time (PT).

How do I call a 840 number from abroad?

Dial +1 840, then the number.

Related Area Codes