424 Area Code: Westside LA & Beach Cities Phone Guide

Quick answer: The 424 area code covers the Westside of Los Angeles, the Beach Cities, and the South Bay — Santa Monica, Beverly Hills, Culver City, Malibu, Manhattan Beach, Hermosa Beach, Redondo Beach, El Segundo, Torrance, San Pedro and the Palos Verdes Peninsula. It went live on July 26, 2006 as an overlay to 310 — both codes ring the exact same coastal LA territory. It sits in Pacific Time, and 10-digit dialing is required for every local call.

424 at a glance

Where the 424 area code covers

424 rings the western edge of Los Angeles County — the strip of cities that runs along the Pacific from Malibu in the north, through Santa Monica, Venice and Marina del Rey, down through El Segundo, the Beach Cities (Manhattan Beach, Hermosa Beach, Redondo Beach), and around the Palos Verdes Peninsula to San Pedro. Inland it reaches into Beverly Hills, Culver City, Torrance, Inglewood, Hawthorne, Lawndale and Gardena.

Other 424 / 310 communities include: West Hollywood (parts), Westwood, Brentwood, Pacific Palisades, Bel Air, Beverly Glen, Cheviot Hills, Mar Vista, Playa del Rey, Playa Vista, Westchester, Lomita, Rolling Hills, Rolling Hills Estates, Rancho Palos Verdes and Catalina Island.

Neighboring area codes

The 310 + 424 overlay — how it works

Phone numbers along the LA coast started running short in the early 2000s. Rather than re-carve the territory and force everyone to renumber, the California Public Utilities Commission layered 424 on top of 310. Both codes now ring the same neighborhoods.

What that means in practice:

• Existing 310 lines stayed 310. Nobody had to change numbers.
• New numbers issued after July 2006 went to whichever pool — 310 or 424 — had inventory. Today, most fresh business lines are 424.
• A 424 number is not "lesser" than a 310 number. They cover the identical geography. To a Santa Monica or Manhattan Beach customer, both read as local.
• 10-digit dialing is mandatory because two codes share one region — the seven-digit local part isn't unique, so the network needs the full number to route.

How the 424 area code works

424 is a standard 10-digit phone number in the North American Numbering Plan (NANP). The format follows the NPA-NXX-XXXX structure:

• 424 — NPA (area code)
• NXX — three-digit central-office prefix
• XXXX — four-digit subscriber line number

Dialing rules:

Time zone of the 424 area code

424 sits in the Pacific Time Zone:

• Pacific Standard Time (PST): UTC−8 (early November through early March)
• Pacific Daylight Time (PDT): UTC−7 (early March through early November)

Reference clock — when it's 12:00 PM in 424 (Santa Monica):

If you're scheduling outbound calls to a 424 number from outside California, target between 9 AM and 5 PM Pacific Time to land in normal Westside business hours.

Cities and counties in the 424 region

The largest 424 cities and what each is known for:

ZIP codes in the 424 area code

The 424 / 310 region overlaps with roughly 80+ Westside / South Bay ZIP codes. The most common ones, grouped by city:

(Source: USPS ZIP code data and California Public Utilities Commission records.)

Example 424 prefixes (NXX)

Hundreds of central-office prefixes are assigned within 424. A sample by area (not exhaustive):

(Source: NANPA Central Office Code Utilization Survey and Telcodata records.)

History and origin of the 424 area code

Quick timeline of the LA coast's dialing history:

Why a 424 number helps your business

The Westside and Beach Cities are saturated with media, tech, entertainment, healthcare and professional-services businesses. A local code reads as "established in LA" — and Pacific-coast customers screen unfamiliar caller IDs aggressively.

Trust and answer rates

People screen calls. A 424 (or 310) caller ID reads as a Westside neighbor; an out-of-state number often goes straight to voicemail.

Marketing and brand recall

A 424 number on a billboard, vehicle wrap or geo-targeted ad reads as local Westside. Vanity numbers — like 424-MALIBU-AGENT or 424-BEACH-PROS — double as advertising.

Flexibility without an office

A virtual 424 number isn't tied to a physical address. Remote teams, online sellers, and out-of-state owners can all run a Santa Monica or Beverly Hills line — calls forward to any device, anywhere.

How to get a 424 phone number

A 424 number is useful if you sell into the Westside, run a service business in Santa Monica, Manhattan Beach or Beverly Hills, target the Silicon Beach / entertainment corridor, or want a local-feeling presence for Westside customers. You don't need to live in California — virtual-number providers can issue you a real 424 number that rings on any device.

The setup runs in five steps and takes about five minutes:

1. Sign up. Free account. No card needed to browse numbers.
2. Search 424 (and 310 if you want options). Both cover the same Westside region.
3. Pick a number. Standard or vanity (e.g. 424-MALIBU-AGENT).
4. Pick a plan. Choose the seat count and features that fit your team.
5. Activate instantly and configure your features.

Features to set up first

A few capabilities deliver value immediately:

• Call forwarding to route calls to any device.
• Voicemail-to-email so messages arrive as text.
• Auto attendant (IVR) to greet and route callers.
• Business SMS to text customers from your line.
• Call recording for quality and training.

Pricing as of mid-2026:

See 424 virtual number options →

Three common mistakes with 424 numbers

1. Thinking 424 is "less local" than 310. It isn't. Both codes cover the identical Westside + Beach Cities territory. To a Santa Monica customer, a 424 number reads exactly as local as a 310 number.
2. Dialing only seven digits. Has not worked across LA since the late 1990s. Always dial all 10 digits.
3. Assuming a 424 caller is physically on the Westside. With virtual numbers and number portability, a 424 number can ring anywhere in the world.

Is 424 a spam-heavy area code?

424 isn't on any "high-risk" robocall list, but as part of a top-2 US metro it sees its share of spoofed calls. The FCC, FTC and California Public Utilities Commission have stepped up enforcement under the STIR/SHAKEN call-authentication framework, which most US carriers fully implemented by 2021. If you receive a suspicious 424 call:

• Don't return it — scammers spoof local-looking 424 numbers to raise pickup rates.
• Report it to the FTC at reportfraud.ftc.gov.
• File a complaint with the FCC at consumercomplaints.fcc.gov.
• Add the number to your phone's block list.

Quick facts: 424 at a glance

Frequently asked questions

Get a 424 virtual number for your business

If you want to sound local to Westside LA customers — for sales calls into Santa Monica and Beverly Hills, a clinic or service business in Manhattan Beach or Redondo Beach, or just to separate work calls from personal mobile — a virtual 424 number sets up in minutes.

My Country Mobile offers 424 numbers with call forwarding, voicemail-to-email, SMS, IVR, and integrations with HubSpot, Zoho, Pipedrive and Zendesk. Calls route to any device worldwide, pricing starts at $12/user/month, and over 17,500 businesses already trust MCM with their virtual phone presence.

Get a 424 virtual number →

Sources

• North American Numbering Plan Administrator (NANPA)
• California Public Utilities Commission — Area Code Information
• Wikipedia — Area codes 310 and 424
• USPS ZIP Code Lookup
• FCC — STIR/SHAKEN call authentication
• Federal Trade Commission — Report fraud