Introduction
Area code 424 is the overlay code for the western Los Angeles region, sharing geographic territory with the older 310 area code. Introduced in 2006 to address number exhaustion in the 310 zone, 424 covers an economically powerful stretch of Southern California that includes Santa Monica, Beverly Hills, Culver City, El Segundo, Torrance, and the entire South Bay. For businesses, a 424 number places you squarely in one of the wealthiest and most media-saturated consumer markets in the United States.
Unlike area codes that serve distinct geographic territories, 424 and 310 overlap completely — every location served by 310 is also served by 424. This means both codes carry equal geographic credibility for the LA Westside. Businesses new to the market often find 424 numbers more readily available than 310, making it the practical choice for teams that need to stand up a local presence quickly without competing for premium 310 DIDs.
Overview of the Area Code 424
Area code 424 covers the western portion of Los Angeles County, a region defined by its coastal geography, high household incomes, and concentration of entertainment, technology, and aerospace industries.
Key cities and communities served by the 424 area code include:
- Santa Monica
- Beverly Hills
- West Hollywood
- Culver City
- El Segundo
- Torrance
- Redondo Beach
- Hermosa Beach
- Manhattan Beach
- Hawthorne
- Inglewood
- Malibu
- Pacific Palisades
- Brentwood
- Marina del Rey
| Detail | Value |
|---|---|
| Area Code | 424 |
| Overlay | 310 (same territory) |
| State | California |
| Major Cities | Santa Monica, Beverly Hills, Torrance |
| Time Zone | Pacific (PST/PDT) |
| Introduced | 2006 |
The 424 and 310 area codes are functionally interchangeable for geographic credibility purposes. A prospect in Santa Monica sees a 424 number the same way they see a 310 number — both are local. This means businesses can claim a premium Westside LA identity without joining a waiting list or paying a premium for a legacy 310 DID. For companies that need multiple lines across the Westside, mixing 424 and 310 numbers under a single VoIP account is a common and accepted practice.
History and Implementation
The 310 area code was assigned to western Los Angeles in 1984 when it was split from the original 213 code. By the early 2000s, the explosive growth of mobile phones, fax lines, internet dial-up connections, and pager services had consumed most of the available 310 number inventory. Rather than split the territory and force existing subscribers to change numbers, regulators introduced 424 as an overlay in 2006 — new subscribers in the same geography received 424 numbers while existing 310 holders kept theirs.
The overlay model meant that 10-digit dialling became mandatory throughout the region immediately upon 424's launch. Even local calls between two 310 numbers now required the full area code prefix — a change that initially frustrated some residents but quickly became standard practice. Today, mandatory 10-digit dialling applies to all California calls regardless of area code, so the distinction is moot for new subscribers.
One practical consequence of the overlay is that callers within the 424/310 territory must always dial 10 digits, even for calls to a neighbour on the same street. This has been standard practice since 2006 and is now unremarkable to residents — but it means that businesses publishing a 424 number should always display it in the full 10-digit format (e.g. 424-555-0100) on all materials to avoid confusion.
How to Get a 424 Area Code Number
A virtual 424 number can be activated through any major VoIP provider in under 15 minutes. No California address is required.
- Select a provider: Compare VoIP carriers on call quality, feature set, and monthly pricing. Most offer trial periods or month-to-month plans with no hardware commitments.
- Search for a 424 DID: Enter 424 as your preferred area code. Because 424 is an overlay, availability tends to be higher than for legacy 310 numbers, giving you more choice on number patterns.
- Configure routing: Set up your IVR, ring groups, voicemail, and call recording rules before going live. Most providers offer a visual drag-and-drop call flow builder.
- Activate and test: Make a test call from a mobile phone to confirm audio quality and routing before publishing the number.
- Port existing numbers: If you already have a 424 or 310 number with another carrier, gather your Letter of Authorization and most recent bill, submit them to the new provider, and keep the old service active until porting completes — typically two to seven business days.
For teams managing multiple lines across the 424 region, a single VoIP platform can consolidate all DIDs under one dashboard, providing unified billing, analytics, and call routing without carrier-by-carrier logins.
Economic Benefits of the Area Code 424
The 424 footprint is among the highest-value local markets in US telecommunications. Beverly Hills, Santa Monica, and the South Bay cities consistently rank among California's top postcodes by household income and consumer spending. A local 424 number gives any business — local or remote — direct access to this affluent customer base with the credibility of a familiar area code.
- Higher answer rates: Local 424 numbers outperform toll-free and out-of-state numbers for cold outreach, with local DIDs consistently delivering 30-60% higher answer rates in studies of call centre performance.
- Local SEO signal: A 424 number listed on your Google Business Profile signals geographic relevance to search algorithms, supporting local pack visibility for queries like "financial advisor near Santa Monica" or "IT support Beverly Hills".
- Consumer trust: High-value clients in the 424 corridor are more likely to engage with a business that displays a recognised local number on proposals, invoices, and marketing materials.
- Market access without a lease: A 424 DID gives remote teams genuine local presence without the cost of a Westside office — critical for SMBs targeting LA's premium market segments.
- Scalable footprint: Add additional 424 lines for new campaigns, seasonal staff, or service lines without physical infrastructure changes.
The South Bay cities within the 424 footprint — El Segundo, Torrance, Redondo Beach, Manhattan Beach — house a significant concentration of aerospace, defence, and technology firms. Companies in these sectors routinely evaluate suppliers and partners by local presence as a proxy for reliability and accountability. A 424 number signals that you are reachable and rooted in the same market, reducing the friction that out-of-area numbers introduce in enterprise sales cycles.
Why Get a Virtual 424 Number?
Virtual 424 numbers come with a full suite of enterprise communication features that make the monthly subscription cost a fraction of what a traditional PBX would have required even five years ago.
- IVR and auto-attendant: Build a professional call menu that routes callers to the right department or team member without a receptionist.
- Call recording and transcription: Record every inbound and outbound call automatically. Many providers now include AI-powered transcription that makes call logs searchable.
- Voicemail to email: Receive missed-call audio files in your inbox with timestamps, so you can triage and respond without logging into a separate system.
- SMS on your 424 number: Send and receive text messages on the same number your clients call, keeping all communication threads under one identifier.
- Analytics dashboard: Monitor call volume, peak hours, missed calls, and average handle time to optimise staffing and coverage across the 424 territory.
- Mobile and desktop apps: Your 424 number works on any device. Staff in Santa Monica and staff working remotely share the same number pool and call history.
For businesses that operate across multiple LA area codes — 424 for the Westside, 323 for Central LA, 213 for downtown — a single VoIP platform can manage all DIDs in one place, with shared contact lists and call routing rules that span the full footprint.
Integrating the 424 Area Code into Modern Communication Systems
The 424 overlay was designed for an era of rapidly expanding digital communication, and modern VoIP platforms are built to match that flexibility. Integrating a 424 number into an existing tech stack typically requires nothing more than an API key or a native connector.
- CRM integration: Connect your 424 number to Salesforce, HubSpot, or any major CRM via native integration or Zapier. Every call is automatically logged against the matching contact record with duration, direction, and recording link.
- Helpdesk platforms: Route 424 inbound calls directly into Zendesk or Freshdesk ticket queues. Agents see the caller's history before they answer.
- Team messaging: Surface 424 call notifications inside Slack or Microsoft Teams so the whole team can see inbound activity in real time.
- Softphone clients: Staff use a desktop or mobile app instead of a desk phone. The 424 number appears on outbound caller ID regardless of which device initiates the call.
Because 424 numbers are software-defined, they can be reassigned, forwarded, or decommissioned without contacting a carrier. A number assigned to a departing team member can be redirected to a colleague in seconds from the admin dashboard.
The overlay nature of 424 also makes it straightforward to run number-based A/B tests on marketing campaigns. Assign different 424 DIDs to different ad creatives, landing pages, or outreach sequences, then compare inbound call volume and conversion rates across the variants. Because all numbers share the same area code, the geographic variable is held constant and results reflect creative performance rather than area code recognition.
Scams and Safety
The 424 area code is spoofed by scammers who rely on its Westside LA associations to add legitimacy to fraudulent calls. Common schemes targeting 424 numbers include neighbour spoofing, government impersonation, and prize fraud. If you receive an unexpected call from a 424 number requesting payment or personal information, verify the caller through an official channel before responding.
Businesses operating a 424 number should enable STIR/SHAKEN call authentication on their VoIP platform to verify outbound caller ID and avoid having legitimate calls flagged as spam by recipient carriers. Registering with the FCC's Robocall Mitigation Database and encouraging clients to save your 424 number in their contacts both reduce the risk of your calls being auto-rejected.
For businesses that already use a 310 number and want to expand capacity, adding 424 lines on the same VoIP account is seamless. Both numbers ring through the same call routing rules, share the same voicemail and recording infrastructure, and appear in the same analytics dashboard. Clients calling either number reach the same team — the only difference is the DID printed on the marketing material that prompted the call.
Conclusion
The 424 area code covers one of the most valuable telecommunications territories in the United States. Its overlap with 310 means it carries the same geographic credibility for the LA Westside, with the practical advantage of broader number availability. Whether you are a startup targeting Beverly Hills clients, a professional services firm expanding into Santa Monica, or a remote team that needs a credible LA presence, a virtual 424 number delivers that positioning at minimal cost.
Browse our pricing plans to get started, or explore our guides for the 213 area code, 323 area code, and 818 area code for broader Los Angeles coverage.
