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840 Area Code 🌍☎️

Area Code Profile · California

The 840 area code is located in the state of California and covers 38 cities, serving a total population of approximately 1,936,270. Major cities covered by the 840 area code include San Bernardino, Fontana, Rancho Cucamonga, Ontario, Pomona (which represents the most populated areas). There are a total of 89 telephone prefix exchanges in this area code, which support an estimated 890,000 active or assignable phone numbers. These prefix lines are operated by 11 distinct carriers, with San Bernardino as the primary rate center location.

Pacific Time38 Cities89 Prefixes

Reverse Phone Lookup in San Bernardino, California

Unmask unknown callers, verify telemarketing reports, and view detailed owner information for any phone number beginning with area code (840).

How it works

1

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Provide any 10-digit phone number starting with the (840) area code.

2

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Our system scans public registries, carrier mappings, and spam reports.

3

Reveal Report

Access location details, line type, carrier, owner information, and safety levels.

Neighborhood Demographics

Calculated demographics and census summary estimations for area code 840.

40.6 y/oMedian Age
$64,600Median Income
$451,000Median Home Value
1,936,270Total Population

Telemarketer Complaints

Most recent complaints and comments for phone numbers beginning with 840.

Did you receive an unwanted call from a (840) phone number?

Help the community identify spammers by filing a comment.

(840) 776-2482May 19, 2026Robocall
Received a silent call. When I answered, there was just dead air for 5 seconds before it automatically disconnected. Likely an automated system testing for active numbers.
See Details
(840) 789-2499May 18, 2026Telemarketer
Offered an unsolicited quote for local roofing and home energy services. They knew my area code but when I asked how they got my number, they hung up immediately.
See Details
(840) 802-2516May 17, 2026Debt Collector
Automated voice caller looking for someone named David. Keeps calling repeatedly asking to settle a debt. I have had this number for years and don't know David.
See Details

Cities in the 840 Area Code

The most populous cities in area code 840 are: San Bernardino (209,924), Fontana (196,069), Rancho Cucamonga (165,269), Ontario (163,924), and Pomona (149,058).

Other cities in the 840 area code include:

Rialto, Chino, Chino Hills, Upland, Redlands, Diamond Bar, Eastvale, Highland, Colton, Yucaipa, Rowland Heights, Beaumont, Montclair, Claremont, San Dimas, La Verne, Walnut, Bloomington, Loma Linda, Lake Arrowhead, Big Bear City, Grand Terrace, Crestline, Muscoy, Mentone.

CityPopulation% in Area Code
San Bernardino209,924100%
Fontana196,06998%
Rancho Cucamonga165,269100%
Ontario163,924100%
Pomona149,058100%
Rialto99,17198%
Chino77,983100%
Chino Hills74,79996%
Upland73,732100%
Redlands68,747100%
Diamond Bar55,544100%
Eastvale53,66810%
Highland53,104100%
Colton52,15496%
Yucaipa51,367100%
Rowland Heights48,99323%
Beaumont36,8776%
Montclair36,664100%
Claremont34,926100%
San Dimas33,37188%

Showing top 20 of 38 cities.

What Time Zone is Area Code 840?

Pacific Time Zone

Abbreviation: PT · UTC Offset: UTC-8

The 840 area code lies within the Pacific Time Zone (PT, UTC-8).

Nearby Area Codes

209Stockton, California213Los Angeles, California279Sacramento, California310Los Angeles, California323Los Angeles, California341Oakland, California350Stockton, California369Santa Rosa, California408San Jose, California415San Francisco, California

Phone Prefixes in the 840 Area Code

89 prefixes found · 11 carriers · 19 rate centers

PrefixCarrierRate Center
(840) 200FRACTEL, LLCCHINO
(840) 201NEW CINGULAR WIRELESS PCS, LLCFONTANA
(840) 202NEW CINGULAR WIRELESS PCS, LLCPOMONA
(840) 203NEW CINGULAR WIRELESS PCS, LLCS BERNDINO
(840) 204NEW CINGULAR WIRELESS PCS, LLCS BERNDINO
(840) 205BANDWIDTH.COM CLEC, LLC - CACLAREMONT
(840) 206NEW CINGULAR WIRELESS PCS, LLCCHINO
(840) 207T-MOBILE USA, INC.ARROWHEAD
(840) 208BANDWIDTH.COM CLEC, LLC - CACLAREMONT
(840) 209T-MOBILE USA, INC.ARROWHEAD
(840) 210T-MOBILE USA, INC.FONTANA
(840) 212T-MOBILE USA, INC.CHINO
(840) 213T-MOBILE USA, INC.REDLANDS
(840) 214T-MOBILE USA, INC.MARSHALL
(840) 215T-MOBILE USA, INC.HIGHLAND
(840) 216T-MOBILE USA, INC.ARROWHEAD
(840) 217T-MOBILE USA, INC.FONTANA
(840) 218CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CACHINO
(840) 219T-MOBILE USA, INC.CALIMESA
(840) 220BANDWIDTH.COM CLEC, LLC - CARIALTO
(840) 221HD CARRIER LLCS BERNDINO
(840) 222FRACTEL, LLCS BERNDINO
(840) 223BANDWIDTH.COM CLEC, LLC - CACALIMESA
(840) 224NEW CINGULAR WIRELESS PCS, LLCS BERNDINO
(840) 225NEW CINGULAR WIRELESS PCS, LLCPOMONA
(840) 226ONVOY, LLC - CAPOMONA
(840) 227CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CAS BERNDINO
(840) 228CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CACOLTON
(840) 229CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CACLAREMONT
(840) 230DISH WIRELESS, LLCPOMONA
(840) 231T-MOBILE USA, INC.POMONA
(840) 232T-MOBILE USA, INC.FONTANA
(840) 233T-MOBILE USA, INC.ARROWHEAD
(840) 234FRACTEL, LLCARROWHEAD
(840) 235COMMIO, LLCCOLTON
(840) 236ONVOY, LLC - CACLAREMONT
(840) 237ONVOY, LLC - CAONTARIO
(840) 238NEW CINGULAR WIRELESS PCS, LLCPOMONA
(840) 239ONVOY, LLC - CAFONTANA
(840) 240ONVOY, LLC - CADIAMONDBAR
(840) 241ONVOY, LLC - CARIALTO
(840) 242ONVOY, LLC - CAUPLAND
(840) 243T-MOBILE USA, INC.POMONA
(840) 244T-MOBILE USA, INC.DIAMONDBAR
(840) 245T-MOBILE USA, INC.REDLANDS
(840) 246T-MOBILE USA, INC.ETIWANDA
(840) 247T-MOBILE USA, INC.HIGHLAND
(840) 248T-MOBILE USA, INC.FONTANA
(840) 249T-MOBILE USA, INC.MARSHALL
(840) 250T-MOBILE USA, INC.ARROWHEAD
(840) 251T-MOBILE USA, INC.REDLANDS
(840) 252T-MOBILE USA, INC.MENTONE
(840) 253T-MOBILE USA, INC.CALIMESA
(840) 254ONVOY, LLC - CARIALTO
(840) 255ONVOY, LLC - CAS BERNDINO
(840) 256T-MOBILE USA, INC.UPLAND
(840) 257T-MOBILE USA, INC.COLTON
(840) 258CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CAHIGHLAND
(840) 259NEW CINGULAR WIRELESS PCS, LLCPOMONA
(840) 284ONVOY, LLC - CACHINO
(840) 300FRACTEL, LLCREDLANDS
(840) 333FRACTEL, LLCPOMONA
(840) 336FRACTEL, LLCCOLTON
(840) 345FRACTEL, LLCPOMONA
(840) 356FRACTEL, LLCARROWHEAD
(840) 400FRACTEL, LLCONTARIO
(840) 444FRACTEL, LLCARROWHEAD
(840) 465FRACTEL, LLCCHINO
(840) 466TON80 COMMUNICATIONS, LLCUPLAND
(840) 500FRACTEL, LLCBIGBEAR CY
(840) 587FRACTEL, LLCS BERNDINO
(840) 588FRACTEL, LLCDIAMONDBAR
(840) 600FRACTEL, LLCCOLTON
(840) 666FRACTEL, LLCFONTANA
(840) 677FRACTEL, LLCETIWANDA
(840) 688FRACTEL, LLCCRESTLINE
(840) 699FRACTEL, LLCONTARIO
(840) 777TERRA NOVA TELECOM INC.POMONA
(840) 788FRACTEL, LLCFONTANA
(840) 799FRACTEL, LLCRIALTO
(840) 800FRACTEL, LLCUPLAND
(840) 804ONVOY, LLC - CACLAREMONT
(840) 837TON80 COMMUNICATIONS, LLCPOMONA
(840) 877FRACTEL, LLCMARSHALL
(840) 888TERRA NOVA TELECOM INC.REDLANDS
(840) 899FRACTEL, LLCHIGHLAND
(840) 900FRACTEL, LLCRIALTO
(840) 977FRACTEL, LLCCLAREMONT
(840) 999TERRA NOVA TELECOM INC.UPLAND

Frequently Asked Questions

Where is area code 840?
Area code 840 is located in California, covering cities including San Bernardino, Fontana, Rancho Cucamonga.
What time zone is area code 840?
Area code 840 is in the Pacific Time Zone (PT, UTC-8).
What state is area code 840?
Area code 840 is in California.