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840 area code

840 area code phone numbers

Browse current phone-number listings in area code 840, associated with Ontario, San Bernardino, Fontana, Upland, Pomona. Compare memorable patterns and listed pricing.

  • Area code 840 is associated with California
  • Time zone: Pacific Time
  • Cities describe numbering-plan coverage, not an Exclusive Digits office
  • Delivered by email after payment with the account number and transfer PIN the carrier asks for
  • Portable to Verizon, AT&T, T-Mobile and all major US carriers
OntarioSan BernardinoFontanaUplandPomonaChinoClaremontColton

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About the 840 area code

Location
San Bernardino County, CA, Los Angeles County, CA, and Riverside County, CA
Time zone
Pacific Time
History
Added in February 2021 as an overlay of 909
Overlays
909 serves the same area as 840
Dialing
Local calls are dialed with 1 + 10 digits
Prefixes
144 exchange prefixes in use, held by 17 carriers
Map of the 840 area codeShaded area shows where 840 numbers are rated, with neighboring area codes outlined around it.760661562714951213949626OntarioSan BernardinoRedlandsArrowheadDiamond BarCalimesaBig Bear City
Approximate 840 coverage from U.S. Census ZIP code areas and NANPA rate centers.

Cities and communities in 840

Ontario, San Bernardino, Fontana, Upland, Pomona, Chino, Claremont, Colton, Redlands, Rialto, Arrowhead, Diamond Bar, Highland, Muscoy, Calimesa, Mentone

ZIP codes in the 840 area code

64 ZIP code areas. Area codes follow telephone exchange boundaries rather than ZIP code lines, so ZIP codes near the edge can also be served by a neighboring area code.

San Bernardino County, CA (54)

91701, 91708, 91709, 91710, 91730, 91737, 91739, 91761, 91762, 91763, 91764, 91784, 91786, 92305, 92313, 92314, 92315, 92316, 92317, 92321, 92322, 92324, 92325, 92333, 92335, 92336, 92337, 92339, 92341, 92346, 92350, 92352, 92354, 92358, 92359, 92369, 92373, 92374, 92376, 92377, 92378, 92382, 92385, 92386, 92391, 92399, 92401, 92404, 92405, 92407, 92408, 92410, 92411, 92415

Los Angeles County, CA (8)

91711, 91750, 91765, 91766, 91767, 91768, 91773, 91789

Riverside County, CA (2)

92320, 92555

Area codes that share 840’s area

909

Neighboring area codes

760661310562714951213818949626

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Daily specials · 840

Today’s $9 numbers

Up to five daily picks per eligible area code. Regularly $49. Save $40.

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These prices end Nov 2, 12:00 AM EST. New picks at midnight Eastern.

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Up to five qualifying numbers per area code; fewer remain as they sell. No repeated picks within seven days. Starting checkout holds the confirmed price for its 15-minute reservation. Adding to your cart alone does not hold a number or its price. Your carrier’s service fees and port completion are separate.