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The 858 area code is located in California and serves the San Diego metropolitan region and its northern suburbs. Businesses use 858 area code numbers to build local presence, trust, and accessibility in the highly competitive San Diego market.
The 858 area code is part of the North American Numbering Plan Administration (NANP) and is assigned to northern and western portions of San Diego County, California, primarily covering the city of San Diego and its northern suburbs. It was introduced on June 12, 1999, as a split from the existing 619 area code.
Because 858 now shares the same geographic region as area code 619 (a boundary‐elimination overlay adopted in June 2018), all local calls in the region require 10-digit dialing.
The 858 region is home to approximately 1.4 million residents, encompassing the northern and western parts of San Diego County, California. San Diego is the second-largest city in California and one of the most economically and culturally vibrant metro areas on the US West Coast.
Economically, the region enjoys a median household income of around $101,000 and a per capita income of approximately $56,000, supported by thriving industries such as biotechnology, defense, healthcare, education, tourism, and information technology.
Major employers include the University of California San Diego (UCSD), Qualcomm, Scripps Health, and several biotech firms clustered in the Torrey Pines and La Jolla areas.
The 858 area code is located in the Pacific Time Zone (PT), which covers the U.S. West Coast, including California. The region operates on UTC–8 during Pacific Standard Time (PST) and UTC–7 during Pacific Daylight Time (PDT), shifting in March and November each year.
This time zone offers a strategic advantage for businesses, especially those engaging in West Coast operations, as it aligns with major innovation hubs and offers efficient coordination with national and global markets.
Companies using an 858 number can effectively liaise with teams and clients across the Pacific, Mountain, Central, and Eastern time zones, making it ideal for tech-driven, global business communication.
The 858 area code connects companies to the economically vibrant and innovation-driven San Diego region, one of the most diverse business and research hubs on the U.S. West Coast.
In a digital age where businesses can be located anywhere, a local phone number is a tangible signal of presence and commitment. Studies show that people are nearly four times more likely to pick up calls from local numbers as compared to toll-free or out-of-area numbers.
For potential customers in the 858 region, seeing a local number instills a sense of trust and familiarity. Calls from the 858 area code can significantly increase the likelihood of a call being answered and a lead being converted. A foreign number or an out-of-area number is more likely to be branded as spam by potential customers.
Some well-known enterprises that would benefit from a local 858 number include:
The San Diego region is experiencing growth in clean energy and utility services, especially with strong state-level mandates for renewables and energy storage.
Hospitals and clinics in the 858 region rely on HIPAA-compliant answering services for patient scheduling, after-hours inquiries, and telemedicine triage.
The 858 region is home to a growing tech and innovation ecosystem, including biotech, telecommunications, software, and defense technology firms.
San Diego serves as a significant harbor and logistics node on the Pacific, crucial for cross-border trade, warehousing, and supply-chain operations.
The San Diego region hosts growing financial services, fintech innovation, and regional banking operations, where localized numbers help build trust with clients.
Insurance and risk-management firms in the San Diego region benefit from using local numbers to reinforce credibility and presence, especially in areas like respiratory health, life, tech-employee coverages, and commercial policies.
Setting up your 858 area code number with Goodcall is quick and straightforward. Here’s how it works:
Choosing Goodcall means more than just getting a local number; it means equipping your business with tools to handle calls efficiently.
With these advantages, Goodcall makes it easier for you to manage calls and focus on growing your business.
Our local 858 area code numbers come with affordable pricing plans designed to fit every business size. We offer flexible pricing options that scale with your needs, whether you’re a startup or an established enterprise. Additionally, you can save 30% on annual subscriptions, giving your business more value at a lower cost.
Apart from the 858 area code in California, several nearby and overlay area codes serve the surrounding regions:
What is the 858 area code, and where is it located?
The 858 area code is a telephone area code for Southern California, primarily serving the northern and western parts of San Diego County, including La Jolla, Del Mar, Rancho Bernardo, Mira Mesa, and Poway.
What cities does the 858 area code cover?
It covers major cities and communities such as San Diego (northern neighborhoods), La Jolla, Del Mar, Rancho Peñasquitos, Sorrento Valley, Mira Mesa, Poway, and Rancho Bernardo, along with surrounding coastal and inland suburbs.
What time zone is area code 858 in?
The 858 area code is in the Pacific Time Zone (PT): UTC–8 during Standard Time (PST) and UTC–7 during Daylight Saving Time (PDT).
Does the 858 area code get spam calls?
Yes. Like any public phone number, 858 numbers can receive spam calls. However, Goodcall’s AI phone agent helps identify, filter, and block spam or unwanted calls to ensure smooth communication with genuine customers.
Which types of businesses benefit most from a local 858 number?
The types of businesses that benefit most from a local 858 number include biotech companies, healthcare providers, universities, defense contractors, financial firms, and tech startups.
How can I get a local 858 area code number for my business?
You can acquire an 858 number through Goodcall, which offers instant setup and advanced features.
Can I forward calls from my 858 number elsewhere?
Yes, you can easily set up call forwarding to any other phone number or device.
How much does it cost to get an 858 area code number?
Costs vary by provider and plan. Goodcall offers tiered pricing based on the number of unique customers: $66 per month per agent annually.
Is the 858 area code toll-free?
No, an 858 area code number is a standard local number, not a toll-free number. Toll-free numbers have prefixes such as 800, 888, 877, etc.