840 area code

There are many locations covered by the 840 area code, but some of the most popular ones include San Bernardino, Rancho Cucamonga, and Pomona (jump to the city list below).

840 is an overlay code that was put into service on 23 February 2021 as part of the overlay complex 909/840 (overlapping area codes cover the same geographic area).

Time in area code 840 (Pacific Time) is 12:29:09 PM right now.

840 Area Code Phone Lookup


Map of area code 840

Map of area code 840
Map of area code 840

Nearby to the 840 Area Codes

you’re probably always looking location map, cities, time zone, overlay codes, reverse phone lookup and related info. Well, one easy way to do that is by knowing your nearby area codes. That way, you don’t have to fumble through your phone’s keypad each time you want to make a call. Plus, it can come in handy when trying to find out where someone is calling from. So without further ado, here are the area codes for some of the most popular U.S. cities!

List of 840-NXX Prefixes and Corresponding Locations

We all know our location by its name and zip code, but do you know your city’s postal prefix? Chances are, unless you work for the post office or are extremely interested in the subject matter, you don’t. But prefixes play a critical role in how mail is sorted and delivered, so it’s important to be aware of them. This blog post will take a closer look at what prefixes are and their corresponding locations. Stay tuned!

Are you curious about the prefixes and corresponding locations of the area code 840? This infographic is a great place to start. It provides an overview of 840 area code, including its name, prefixes and date. The infographic also includes a map that shows the location of each area code. this guide is sure to come in handy. Enjoy!

NPANXXArea servedDate
840-203San Bernardino7/29/2021
840-204San Bernardino7/29/2021
840-222San Bernardino12/24/2020
840-588Diamond Bar10/28/2021
  • The NPA refers to the Numbering Plan Area (area code) and the NXX refers to the central office code.
  • The rate center is listed under ‘Area served’. A rate center is the geographic area used to determine local calling boundaries for billing purposes in the North American Numbering Plan. NPA-NXX are generally associated with a locality, but are not always the only one offering services.
  • Assignment date. Exchange codes assigned prior to 2001 do not display a date.

List of Cities in Area Code 840

Looking to find out what cities are in your area code 840? You’ve come to the right place! We’ve put together a comprehensive list of major cities and their corresponding area codes. Whether you’re looking to relocate or just curious, you’ll be able to find what you need here.

So without further ado, let’s get started! We’ve compiled a list of every city in the 840 area code with the corresponding phone number. We hope you find this information helpful!

Angelus OaksSan BernardinoP
Big Bear CitySan BernardinoP
Big Bear LakeSan BernardinoP
BloomingtonSan BernardinoP
Blue JaySan BernardinoP
Bryn MawrSan BernardinoP
Cedar GlenSan BernardinoP
Cedarpines ParkSan BernardinoP
ChinoSan BernardinoP
Chino HillsSan BernardinoP
ClaremontLos AngelesP
ColtonSan BernardinoP
Crest ParkSan BernardinoP
CrestlineSan BernardinoP
Diamond BarLos AngelesP
FawnskinSan BernardinoP
FontanaSan BernardinoP
Forest FallsSan BernardinoP
Green Valley LakeSan BernardinoP
GuastiSan BernardinoP
HighlandSan BernardinoP
La VerneLos AngelesP
Lake ArrowheadSan BernardinoP
Loma LindaSan BernardinoP
Lytle CreekSan BernardinoP
MentoneSan BernardinoP
MontclairSan BernardinoP
Mount BaldyLos AngelesP
OntarioSan BernardinoP
PattonSan BernardinoP
PomonaLos AngelesP
Rancho CucamongaSan BernardinoP
RedlandsSan BernardinoP
RialtoSan BernardinoP
RimforestSan BernardinoP
Running SpringsSan BernardinoP
San BernardinoSan BernardinoP
San DimasLos AngelesP
SkyforestSan BernardinoP
SugarloafSan BernardinoP
Twin PeaksSan BernardinoP
UplandSan BernardinoP
WalnutLos AngelesP
YucaipaSan BernardinoP
  1. The table above lists the majority, but often not all, of the places where area code 840 is available. There can be more than one place with the same name within a state, but we only list the largest one. Bold letters indicate cities with a population over 50,000.
  2. There are currently 12:29:09 minutes left in Pacific Time (currently 12:29:09 PM).

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