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US area code · California

310 area code

Where the 310 area code is, its overlay and how to dial a +1 310 number from anywhere.

CoversLos Angeles, CaliforniaTime zonePacific (PT)TypeOverlay
Quick answer

The 310 area code is in Los Angeles, California, United States (Pacific (PT)). To call from abroad: +1 310 555-0123. It is an overlay, so all 10 digits are dialled.

StateCalifornia
Main areaLos Angeles
Time zonePacific (PT)
TypeOverlay
10-digit dialingRequired
In service since31-Aug-1990

The 310 area code is a geographic North American Numbering Plan (NANP) code covering Los Angeles, California. It has been in service since 31-Aug-1990 and sits in the Pacific (PT) time zone.

Overlay 310 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

310213424

How to dial a 310 number

From abroad+1 310 555-0123
Within the US / Canada1 310 555-0123
Locally (same area)310 555-0123

Cities in the 310 area code

A 310 number is usually in one of these places in California — 1 county.

Beverly Hills Los AngelesCulver City Los AngelesGardena Los AngelesHawthorne Los AngelesInglewood Los AngelesLawndale Los AngelesLennoxLomita Los AngelesLynwood Los AngelesManhattan Beach Los AngelesRancho Palos Verdes Los AngelesRedondo Beach Los AngelesSanta Monica Los AngelesTorrance Los AngelesWest Carson

Other California area codes

209213279323341350357369408415424442510530559562

Frequently asked questions

Where is the 310 area code?

The 310 area code is in Los Angeles, California, United States (Pacific (PT)).

Is 310 an overlay area code?

Yes. 310 overlays the same region as 213, 424, so callers dial all 10 digits.

Do I have to dial 10 digits for 310?

Yes — dial the area code plus the seven-digit number.

How do I call a 310 number from another country?

Dial your exit code (or +), then 1, then 310, then the number: +1 310 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 310 number does not pinpoint a street or ZIP code.

Number holders in area code 310

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 800 prefixes are in use in 310, shared by 28 companies. The largest holders:

CompanyPrefixesShare
Pacific Bell25031%
Frontier California Inc.13717%
New Cingular Wireless PCS, LLC689%
T-Mobile USA, Inc.587%
Cellco Partnership Dba Verizon Wireless567%
Mcimetro Access Transmission Services LLC273%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 310 numbers

Reports to the FTC, last 30 days
371
Recorded messages or robocalls
54%
Rank among area codes
#258 of 670
Most reported subjects
Other (148)
Dropped call or no message (90)
Calls pretending to be government, businesses, or family and friends (25)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 310 — cities & rate centres

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