Area code 310 serves as the telephonic backbone for the most iconic coastal and western regions of Los Angeles County. Established in the early 1990s, this numbering plan area (NPA) covers a diverse geographical stretch, ranging from the opulent hills of Beverly Hills to the surfing meccas of the South Bay and even the remote beauty of Santa Catalina Island. In 2026, the 310 prefix remains one of the most recognizable and sought-after identifiers in the North American Numbering Plan, representing a mix of high-end real estate, global entertainment hubs, and a burgeoning tech sector.

The geographic footprint of area code 310

The boundary of area code 310 is defined by the unique topography of Southern California. It primarily encompasses the Westside and the South Bay areas. When looking at a map of Los Angeles, the 310 region hugs the Pacific coastline, starting from the rugged cliffs of Malibu in the north and extending down to the industrial and residential heart of San Pedro in the south.

Major inland sections include parts of the Los Angeles basin that are synonymous with luxury and commerce. Cities like Culver City, known for its deep roots in cinema, and Inglewood, which has recently transformed into a premier sports and entertainment destination, fall within these lines. The area also covers the Palos Verdes Peninsula, a high-income enclave characterized by its dramatic ocean views and rural-suburban feel. Further offshore, the entirety of Santa Catalina Island, including the city of Avalon, utilizes the 310 code, connecting the island’s tourism-based economy to the mainland's infrastructure.

A history of splits and overlays

Understanding area code 310 requires a look back at the rapid expansion of Southern California’s population and its subsequent demand for telecommunication lines. Originally, the entire Los Angeles region was served by area code 213. As the city grew, the need for more numbers became critical. On November 2, 1991, area code 310 was officially created through a geographic split from 213. At that time, it was a significant change for residents who had identified with the 213 prefix for decades.

The expansion didn't stop there. By the mid-1990s, the 310 area itself was facing number exhaustion. This led to another split in 1997, which created area code 562 for the southeastern portion of Los Angeles County and parts of Orange County. Long Beach and Whittier, which were originally part of the 310 territory, transitioned to 562 during this period.

The most substantial change in recent decades occurred in 2006 with the introduction of area code 424. Instead of another geographic split, which would have forced businesses to change their stationery and signage yet again, the California Public Utilities Commission implemented an "overlay." This means that area code 424 covers the exact same geographic area as 310. While legacy numbers retain the 310 prefix, most new lines issued in the region over the last twenty years have been assigned the 424 code. This overlay necessitated the mandatory 10-digit dialing system that remains the standard today.

Deep dive into the Westside communities

The Westside of Los Angeles is perhaps the most famous portion of the 310 area. This sub-region is a global center for the arts, education, and the entertainment industry.

Santa Monica and the Silicon Beach phenomenon

Santa Monica is a primary hub within area code 310. It is a city that blends beachfront leisure with an intense professional atmosphere. Over the last decade, it has become the anchor of "Silicon Beach," a nickname for the region's massive tech ecosystem. Startups and established tech giants alike occupy office spaces in converted warehouses and modern glass buildings. For a business, having a 310 number in Santa Monica often signals a connection to this innovative corridor, linking them to a network of venture capital and digital media.

Beverly Hills and Westwood

Beverly Hills is perhaps the most prestigious city associated with area code 310. Although a small portion of the city uses area code 323, the vast majority of its commercial and residential lines are 310. This creates a strong cultural association between the digits and high-net-worth services. Just to the west lies Westwood, home to the University of California, Los Angeles (UCLA). The presence of a major research university adds a layer of academic and medical prestige to the 310 prefix, as the UCLA Health system operates numerous facilities within this zone.

Malibu and the Pacific Palisades

Moving north along the Pacific Coast Highway, the 310 area code serves the exclusive neighborhoods of Pacific Palisades and Malibu. These areas are characterized by lower population density but extremely high real estate value. Malibu, stretching 21 miles along the coast, uses the 310 code for everything from its small local businesses at the Malibu Country Mart to the residents living in the world-renowned Malibu Colony. In these communities, the 310 prefix is often associated with privacy and an upscale coastal lifestyle.

Exploring the South Bay and Harbor areas

While the Westside gets much of the media attention, the South Bay is an equally vital part of the 310 landscape. This region offers a slightly different vibe, focusing more on aerospace, international trade, and tight-knit beach communities.

The Beach Cities: Manhattan, Hermosa, and Redondo

Manhattan Beach, Hermosa Beach, and Redondo Beach are the heart of the South Bay's 310 territory. These cities are known for their high quality of life, excellent schools, and outdoor-oriented culture. Professionally, many residents in these areas work in the aerospace industry, which has a massive presence in the neighboring city of El Segundo. A 310 number here might belong to a local surf shop, a boutique real estate firm, or a high-level engineer at a defense contractor.

Torrance and Carson

Torrance is one of the largest cities in the 310 area by population and land area. It serves as a major industrial and commercial engine, hosting the American headquarters of several international corporations. Carson, located just to the east, is a hub for logistics and manufacturing. The use of 310 in these cities highlights the area code's role in the global supply chain, particularly given their proximity to the Port of Los Angeles.

San Pedro and the Port of Los Angeles

San Pedro, the southernmost point of the 310 mainland, is home to the busiest container port in the Western Hemisphere. The 310 area code here connects the labor unions, shipping logistics companies, and maritime services that keep the American economy moving. It is a community with a deep history of immigration and industry, offering a grit and authenticity that contrasts with the polish of Beverly Hills, yet all under the same three digits.

Dialing logistics and technical details

Since the 2006 overlay, dialing procedures within the 310/424 region have been standardized. To complete any call, even to a neighbor across the street, the caller must use the full 10-digit number. While the leading "1" is not always required for local calls on mobile devices, landline users generally need to dial 1 + area code + the seven-digit number.

From a technical standpoint, the 310 area code consists of several hundred prefixes (the three digits following the area code). For example, prefixes like 201, 271, and 470 have historically been associated with specific central offices in Beverly Hills or West Los Angeles. However, with the advent of number portability, where a consumer can keep their phone number even when moving between carriers or locations, these geographic associations have become less rigid. A person might have a 310 number originally issued in Santa Monica but now live and work in an entirely different part of the state.

The cultural status of the 310 prefix in 2026

By 2026, the scarcity of original 310 numbers has only increased their perceived value. In a world of digital communication, certain legacy identifiers still hold weight. Much like a zip code can influence property perceptions, an area code can act as a subtle signal of longevity and local established presence.

Businesses often prefer 310 over 424 because it suggests they have been operating in the region since at least the early 2000s. This sense of permanence can be an asset in industries like law, finance, and luxury retail. For individuals, a 310 number is often seen as a sign of being a long-term Angeleno. This has created a niche market for "vanity" numbers or the acquisition of old 310 lines through secondary services.

However, it is worth noting that for the younger generation and the thousands of people moving to Los Angeles every year, the 424 overlay is the norm. The distinction is becoming more of a historical curiosity than a practical barrier, yet the 310 prefix remains the "gold standard" for many.

Economic drivers within the 310 zone

Several key economic sectors drive the high volume of telecommunications traffic in the 310 area code. Understanding these helps explain why the region required an overlay in the first place.

  1. Aerospace and Defense: Companies in El Segundo and Redondo Beach are world leaders in satellite technology and aviation. These firms require vast networks of secure communication lines.
  2. Entertainment and Media: With Sony Pictures in Culver City and various talent agencies in Beverly Hills and Century City, the 310 area is the switchboard for global entertainment deals.
  3. Tourism: From the Santa Monica Pier to the luxury hotels of the Westside, the tourism industry generates millions of calls for reservations, inquiries, and services.
  4. International Trade: As mentioned, the Port of Los Angeles in San Pedro is a massive driver of B2B communication, linking Southern California to Asian and European markets.
  5. Higher Education: UCLA is not just a university; it is a city within a city, with tens of thousands of students and faculty members contributing to the dense usage of the 310/424 numbering pool.

Security and scam awareness

Because area code 310 is associated with affluent areas, it is frequently targeted by scammers using "neighbor spoofing" techniques. This is a tactic where a robocaller uses a fake Caller ID to make it look like they are calling from a local 310 number. The goal is to increase the likelihood that the recipient will answer the phone, thinking it is a local business or a neighbor.

In 2026, residents should remain cautious. Common scams include fraudulent calls claiming to be from a major utility company like Southern California Edison or local government agencies. Generally, official organizations will not ask for sensitive financial information or payment via gift cards over the phone. Using call-blocking technology provided by mobile carriers is a recommended step to filter out these unwanted 310-labeled calls.

The future of 310 and 424

As we look toward the future of the North American Numbering Plan in California, it is possible that even the 310/424 overlay will eventually reach capacity. The California Public Utilities Commission constantly monitors the "exhaust dates" of area codes. While the 424 overlay provided significant relief, the sheer number of connected devices—including not just phones but also tablets, cars, and smart devices—continues to put pressure on available numbers.

For now, the 310 area code remains a definitive part of the Los Angeles identity. It covers the sunsets of Malibu, the hustle of the Port of Los Angeles, and the glamour of the Westside. Whether it’s a landline in a historic estate or a mobile phone in a tech startup, those three digits tell a story of a region that is constantly evolving while holding onto its iconic roots.