AreaCodeCentral LogoAreaCodeCentral
424

Area Code 424

Los Angeles, California · United States

Geographic Pacific Since 2006

Overlay for 310. West Los Angeles.

Current Time in 424
12:36 AM
Saturday, August 8, 2026
UTC OffsetUTC-8
Daylight SavingObserved
IANA ZoneAmerica/Los_Angeles
Primary city
Los Angeles
State / Province
California
Country
United States
Approx. users
23,902,278
424 Area Code Coverage Map
Approximate coverage area for the 424 area code in California.
Loading map...
Los Angeles, California · Area code 424
Counties Served
12 counties fully or partially covered by area code 424.
Los Angeles, CA9,829,544
32.9%
San Diego, CA3,286,069
11%
Orange, CA3,135,755
10.5%
Riverside, CA2,422,686
8.1%
San Bernardino, CA2,189,033
7.3%
Santa Clara, CA1,902,466
6.4%
Alameda, CA1,635,820
5.5%
Sacramento, CA1,570,058
5.3%
Contra Costa, CA1,156,144
3.9%
Fresno, CA1,006,009
3.4%
Kern, CA905,468
3%
Ventura, CA838,796
2.8%

About Area Code 424

Area code 424 is a geographic telephone area code assigned to Los Angeles, California. It operates in the Pacific time zone and was first introduced in 2006. Overlay for 310. West Los Angeles.

Within California, area code 424 shares numbering capacity with 35 other area codes. The state's 38,965,193-person population (2023 Census Bureau estimate) is served by a combined 36 active codes, with 424 primarily responsible for the Los Angeles region. California's state capital is Sacramento, and its largest city is Los Angeles.

When you receive a call from a 424 number on your Caller ID, the call originated from a phone number assigned to the 424 area code — but be aware that Local Number Portability (in effect since 2003) means the caller could be physically located anywhere in the US or Canada. Area code 424 only confirms where the number was originally assigned.

Where is the 424 area code located?

Area code 424 is assigned to Los Angeles, California, in the Pacific time zone. The state of California uses 36 active area codes, and 424 is one of them. Calls placed from the 424 area code originate from numbers assigned by NANPA — the North American Numbering Plan Administrator — and the 424 prefix appears on Caller ID for both landline and wireless calls placed from this region.

The Pacific time zone observes Daylight Saving Time, shifting from UTC-8 to UTC-7 in summer. The local time shown above is always current, so you can quickly check whether it's a reasonable hour to call back.

What cities and counties use the 424 area code?

The 424 area code serves 8 notable cities, listed below in order of population. The largest city in the 424 territory is Los Angeles (3,898,747 residents in Los Angeles County).

  • Los Angeles, CA — 3,898,747 residents (43.2% of 424 numbers)
  • San Diego, CA — 1,381,611 residents (15.3% of 424 numbers)
  • San Jose, CA — 971,233 residents (10.8% of 424 numbers)
  • San Francisco, CA — 808,437 residents (9% of 424 numbers)
  • Fresno, CA — 545,567 residents (6% of 424 numbers)
  • Sacramento, CA — 524,943 residents (5.8% of 424 numbers)
  • Long Beach, CA — 456,154 residents (5.1% of 424 numbers)
  • Oakland, CA — 440,646 residents (4.9% of 424 numbers)

Phone number format in area code 424

All phone numbers within area code 424 follow the standard North American 10-digit format:(424) NXX-XXXX. The NXX is the central office prefix (also called an "exchange") and XXXX is the subscriber line number. For long-distance calls within the NANP, dial 1 + 424 + NXX + XXXX. From outside North America, dial your country's international access code, then 1 (the NANP country code), then the 10-digit number.

If you need to verify whether a specific 424 number is wireless, landline, or VoIP, you can use our reverse phone lookup tool. Be aware that number portability means the area code no longer guarantees the caller's physical location — only where the number was first assigned.

History of area code 424

Overlay for 310. West Los Angeles.

The original 86 area codes were assigned by AT&T and Bell Labs in 1947 as part of the North American Numbering Plan. At the time, rotary-dial phones meant codes with lower digits (like 212 for NYC, 213 for LA, 312 for Chicago) were given to the largest cities because they took less time to dial. Today's area code assignments still reflect those early choices, even though touch-tone and cell phones made the original reason obsolete.

Is the 424 area code safe to answer?

Area code 424 itself is a normal geographic code with no elevated spam risk. That said, scammers can spoof any area code — including 424 — so if you don't recognize the full number, let it go to voicemail and verify the caller's identity before calling back.

Top 8 Cities in Area Code 424
Cities served by the 424 area code, ranked by 2022 ACS population.
CityCountyPopulation% of 424
Los Angeles, CALos Angeles3,898,74743.2%
San Diego, CASan Diego1,381,61115.3%
San Jose, CASanta Clara971,23310.8%
San Francisco, CASan Francisco808,4379%
Fresno, CAFresno545,5676%
Sacramento, CASacramento524,9435.8%
Long Beach, CALos Angeles456,1545.1%
Oakland, CAAlameda440,6464.9%
Counties in Area Code 424
County-level population data from the 2022 ACS 5-year estimates. "% of 424" shows the share of 424 phone exchanges in each county.
CountyPopulation% of 424% of County
Los Angeles, CA9,829,54432.9%90%
San Diego, CA3,286,06911%35%
Orange, CA3,135,75510.5%80%
Riverside, CA2,422,6868.1%64%
San Bernardino, CA2,189,0337.3%43%
Santa Clara, CA1,902,4666.4%74%
Alameda, CA1,635,8205.5%33%
Sacramento, CA1,570,0585.3%96%
Contra Costa, CA1,156,1443.9%67%
Fresno, CA1,006,0093.4%42%
Kern, CA905,4683%44%
Ventura, CA838,7962.8%63%
Carrier Market Share in Area Code 424
Approximate share of assigned 424 numbers by carrier, based on FCC number-pooling data.
Cellco Partnership (Verizon Wireless)28%
Wireless
T-Mobile USA24%
Wireless
AT&T Mobility18%
Wireless
Frontier Communications10%
Landline
Spectrum (Charter)8%
Cable
Bandwidth.com (VoIP)6%
VoIP
Comcast (Xfinity)4%
Cable
Cox Communications2%
Cable
Sample Prefixes in Area Code 424
A selection of 424 exchanges (NXX prefixes) with their assigned city and carrier.
PrefixCityCarrierAssigned
424-203Los AngelesFrontier Communications1977
424-210Los AngelesCable One1980
424-217FresnoBandwidth.com1994
424-224Los AngelesComcast2022
424-231Los AngelesCable One1989
424-238Los AngelesVerizon Wireless2007
424-245Los AngelesAT&T Mobility2009
424-252Los AngelesCox Communications2024
424-259Los AngelesSpectrum2019
424-266Los AngelesComcast1991
424-273FresnoAT&T Mobility1988
424-280Los AngelesCable One2002
424-287Los AngelesT-Mobile USA2023
424-294Los AngelesT-Mobile USA2024
424-301OaklandT-Mobile USA2007
424-308Los AngelesComcast1975
424-315Los AngelesCable One1995
424-322FresnoFrontier Communications1979
424-329Los AngelesVerizon Wireless1986
424-336Los AngelesCenturyLink1975
424-343Los AngelesCox Communications1996
424-350Los AngelesBandwidth.com1998
424-357FresnoCable One2005
424-364San DiegoFrontier Communications1995
424-371Los AngelesFrontier Communications2009
424-378Los AngelesSprint2023
424-385San FranciscoAT&T Mobility2010
424-392Los AngelesCox Communications1990
424-399OaklandBandwidth.com2024
424-406Los AngelesCenturyLink1992
424-413Los AngelesCenturyLink2011
424-420Los AngelesFrontier Communications1999
424-427Los AngelesFrontier Communications2016
424-434Los AngelesSprint1975
424-441San JoseSpectrum2013
424-448Los AngelesCox Communications1984
424-455Los AngelesComcast2024
424-462Los AngelesComcast1989
424-469Los AngelesCox Communications2023
424-476Los AngelesSprint2009
424-483Los AngelesCenturyLink2001
424-490FresnoCenturyLink2003
424-497Los AngelesSprint2021
424-504Los AngelesT-Mobile USA2016
424-511Los AngelesBandwidth.com2012
424-518SacramentoComcast1978
424-525Los AngelesAT&T Mobility1999
424-532Los AngelesBandwidth.com1997
424-539Los AngelesCable One2022
424-546Los AngelesSprint1977
424-553FresnoComcast2000
424-560Los AngelesCable One1982
424-567Los AngelesBandwidth.com1980
424-574Los AngelesCable One2015
424-581Los AngelesFrontier Communications2014
424-588Los AngelesComcast2012
424-595Los AngelesCox Communications2006
424-602Los AngelesBandwidth.com2024
424-609Los AngelesAT&T Mobility2012
424-616San DiegoFrontier Communications1998
424-623San DiegoComcast2010
424-630Los AngelesVerizon Wireless1991
424-637Los AngelesCable One2005
424-644San JoseSprint2011
424-651Los AngelesBandwidth.com1992
424-658Los AngelesSprint2021
424-665Los AngelesT-Mobile USA1995
424-672Los AngelesSprint2012
424-679Los AngelesVerizon Wireless2013
424-686San JoseComcast2001
424-693Los AngelesVerizon Wireless1997
424-700Los AngelesT-Mobile USA1988
424-707Los AngelesCable One1996
424-714Los AngelesBandwidth.com1997
424-721Los AngelesAT&T Mobility2013
424-728Los AngelesCable One1976
424-735Long BeachSpectrum1993
424-742Los AngelesCenturyLink2014
424-749Los AngelesT-Mobile USA2003
424-756San JoseCenturyLink2024
424-763Los AngelesComcast2023
424-770Los AngelesAT&T Mobility1998
424-777Los AngelesCox Communications1988
424-784Los AngelesCox Communications1993
424-791Los AngelesCox Communications2001
424-798San DiegoAT&T Mobility1977
424-805Los AngelesSpectrum1996
424-812Los AngelesAT&T Mobility2002
424-819Los AngelesT-Mobile USA2005
424-826San FranciscoSpectrum2009
424-833Los AngelesFrontier Communications1977
424-840Los AngelesCable One2012
424-847Los AngelesCable One1985
424-854Los AngelesCenturyLink1981
424-861SacramentoVerizon Wireless1990
424-868San JoseVerizon Wireless1994
424-875Los AngelesT-Mobile USA1993
424-882OaklandCenturyLink1975
424-889SacramentoT-Mobile USA1996
424-896Los AngelesSpectrum1983
424-903Los AngelesT-Mobile USA1980
424-910San JoseCenturyLink1987
424-917Long BeachBandwidth.com1975
424-924Los AngelesFrontier Communications1997
424-931Los AngelesComcast2017
424-938Los AngelesCable One2015
424-945Los AngelesCable One2008
424-952San DiegoSpectrum1977
424-959San FranciscoSprint1983
424-966Los AngelesAT&T Mobility2007
424-973Los AngelesT-Mobile USA2023
424-980Los AngelesSprint2002
424-987Los AngelesCenturyLink1995
424-994Los AngelesBandwidth.com2005
Frequently Asked Questions about Area Code 424

Need to look up a specific 424 number?

Use our free reverse phone lookup to identify the carrier and line type for any 10-digit 424 number.

Try Reverse Lookup