248 Area Code: Michigan Cities, Time Zone & Phone Numbers

Introduction

The 248 area code is one of Michigan's most recognized regional identifiers, covering the thriving suburban communities of Oakland County northwest of Detroit and a portion of neighboring Wayne County. Understanding this area code matters whether you receive calls from the region, plan to reach local customers, or need a credible Michigan phone presence for your business. In this guide, you will discover which cities the 248 area code serves, its Eastern Time Zone, its history since 1997, scam types to watch for, and how to get a virtual 248 phone number quickly and affordably. If you are an entrepreneur, sales professional, or simply curious about incoming calls, this is the most complete resource you will find.

Key Takeaways

• Area code 248 covers Oakland County, Michigan, and parts of Wayne County, serving more than 1.37 million residents across over 30 cities.
• Troy, Southfield, Farmington Hills, Pontiac, and Royal Oak are the most prominent cities in the 248 region.
• The 248 area code launched on May 10, 1997, following a split from area code 810.
• All local calls in the region follow Eastern Time — EST (UTC-5) in winter and EDT (UTC-4) during daylight saving time.
• Virtual 248 phone numbers are available through VoIP providers, giving businesses an instant local presence in southeastern Michigan.

What Is the 248 Area Code?

The 248 area code is a telephone area code in the North American Numbering Plan (NANP) assigned to southeastern Michigan. It serves Oakland County and select communities in Wayne County, covering a combined population of approximately 1.37 million people. This is one of the most economically active codes in the Detroit metropolitan area, closely tied to corporate headquarters, top-rated schools, and upscale suburban neighborhoods.

Area code 248 shares its geographic territory with an overlay code — area code 947. The 947 code was introduced in 2001 to address growing demand for new phone numbers driven by mobile devices and internet services. Because both codes serve the same region, all callers must dial ten digits for every local call placed within the 248/947 zone.

Where Is the 248 Area Code Located?

The 248 area code is located in the southeastern corner of Michigan, sitting directly north and northwest of the city of Detroit. Oakland County forms the core of this coverage zone and consistently ranks among the wealthiest counties in the United States by median household income. The footprint extends slightly south and west into Wayne County, picking up communities such as Livonia and Northville.

This region is a central part of the greater Detroit metro area, one of the largest in the Midwest. The 248 zone serves as the suburban backbone of that metro — a mix of residential neighborhoods, corporate campuses, major health systems, and retail centers. Major highways including I-75, I-696, and M-59 run through the area, making it one of the most accessible suburban corridors in all of southeastern Michigan.

248 Area Code Geographic Boundaries

The 248 coverage area runs roughly from Novi and Wixom in the west to Auburn Hills and Rochester in the north and Bloomfield Hills and Southfield in the south. Think of it as a dense band of communities wrapping around the northern edge of Detroit. The region spans approximately 910 square miles and shares boundaries with Lake St. Clair communities to the east.

Major Cities Covered by the 248 Area Code

More than 30 cities and townships fall within the 248 area code footprint. Here are the most significant:

Troy — One of Michigan's most prosperous cities, Troy is home to major corporate offices, high-end retail at Somerset Collection, and a dense concentration of professional service firms.

Southfield — Often called the "Center of It All," Southfield features dozens of regional headquarters for Fortune 500 companies and serves as one of Oakland County's primary commercial hubs.

Farmington Hills — A large suburban city known for strong public schools, a diverse community, and an expanding healthcare sector anchored by major hospital systems.

Pontiac — The county seat of Oakland County, Pontiac has deep roots in the automotive industry and is actively developing new mixed-use and revitalization districts.

Royal Oak — Popular with young professionals and the arts community, Royal Oak offers a vibrant dining and entertainment scene alongside solid residential neighborhoods.

Auburn Hills — Home to Stellantis North America (formerly Fiat Chrysler Automobiles), Auburn Hills remains a key node in Michigan's automotive supply chain.

Other communities carrying 248 numbers include Bloomfield Hills, Novi, Rochester Hills, West Bloomfield, Waterford, Birmingham, Clawson, Wixom, and Keego Harbor.

What Time Zone Is the 248 Area Code In?

The 248 area code follows Eastern Time (ET), the same time zone as New York, Washington D.C., and Atlanta. During winter months, this means Eastern Standard Time (EST) at UTC-5. When daylight saving time begins each spring, the region shifts to Eastern Daylight Time (EDT) at UTC-4.

This matters for anyone dialing into the 248 area from another part of the country:

• From Pacific Time (PT): the 248 zone is 3 hours ahead.
• From Central Time (CT): the 248 zone is 1 hour ahead.
• From Mountain Time (MT): the 248 zone is 2 hours ahead.

Standard business hours in the 248 area run from 9 AM to 5 PM local time. If you are calling from the West Coast, you need to reach out before 2 PM Pacific to catch Oakland County contacts during office hours. For national sales teams targeting southeastern Michigan, knowing this time offset can be the difference between catching a decision-maker at their desk or going straight to voicemail.

A Brief History of the 248 Area Code

The 248 area code officially launched on May 10, 1997. Before that date, Oakland County was served by area code 810, a code that covered a wide stretch of southeastern Michigan. As the Detroit suburbs grew rapidly through the 1990s — especially in Troy, Farmington Hills, and Southfield — demand for new telephone numbers outpaced what the 810 pool could supply.

The solution was a geographic split. Area code 248 was created to serve Oakland County and nearby communities, while area code 586 was assigned to neighboring Macomb County to the northeast. This division gave both regions room to meet surging demand without service disruption.

By 2000, the explosive growth of mobile phones and internet connections exhausted the 248 numbering capacity faster than anyone had anticipated. The FCC approved area code 947 as a full overlay for the same geographic area in 2001, and ten-digit dialing became mandatory starting January 26, 2002. Today, the 248 area code remains the dominant identifier for Oakland County — a legacy that now spans nearly three decades of Michigan suburban growth. Businesses expanding into Detroit proper connect through the neighboring 313 area code, which anchors the city itself.

248 Area Code Scam Calls — What to Watch For

Like many high-density suburban area codes, the 248 area code has been spoofed by phone scammers who use local-looking numbers to increase their answer rates. Recognizing what to expect can protect you from costly mistakes.

The most frequently reported scam types associated with 248 numbers include:

• Mortgage loan solicitations — account for nearly 20% of reported spam calls from this area code
• Health insurance pitches — often targeting seniors and self-employed individuals
• Medicare and Medicaid scams — callers impersonating government benefit verifiers
• Auto warranty calls — unsolicited protection plan offers targeting vehicle owners
• Credit card debt threats — fake collection agencies claiming imminent legal action

If you receive an unexpected 248 phone number call from an organization you do not recognize, do not share personal or financial information. Cross-check the number with a reverse phone lookup tool before calling back. That said, the overwhelming majority of calls originating from this area code are entirely legitimate — businesses, healthcare providers, schools, and ordinary residents going about their day.

Suspected 248 scam calls can be reported to the FTC's official fraud reporting portal to help investigators shut down spoofing operations targeting Oakland County residents.

Why Businesses Choose a 248 Area Code Number

A local phone number carries significant weight with customers. Research consistently shows that people are far more likely to answer calls from area codes they recognize. For businesses targeting clients in Oakland County or the broader Detroit suburbs, holding a 248 number signals regional credibility — even when your team operates entirely remotely.

Practical reasons to get a 248 phone number include:

• Sales teams prospecting Michigan-based accounts in automotive, healthcare, and technology
• Customer service lines wanting a familiar local identity for southeastern Michigan clients
• Startups and freelancers establishing credibility in Troy, Southfield, or Farmington Hills
• National companies with clients, partners, or suppliers headquartered in Oakland County

Virtual 248 numbers require no physical office, no hardware, and no local staff. A VoIP provider handles all the routing, so your team answers calls from anywhere while still appearing entirely local to every customer who dials in. Teams expanding across the broader Midwest frequently pair a 248 number with the 317 area code for a complete Great Lakes and Indiana market presence.

How to Get a Virtual Michigan Number in the 248 Zone

Getting set up with a local Michigan number in the 248 area is faster and simpler than most people expect. Virtual number providers let you search available numbers, choose a plan, and go live in under 15 minutes — no installation appointment, no waiting on a carrier.

The general steps look like this:

1. Choose a VoIP provider that offers Michigan local numbers with 248 availability.
2. Select a plan based on your expected call volume, features, and team size.
3. Browse available 248 numbers — filter by area code and pick one that fits your brand.
4. Activate and configure — set up call forwarding, voicemail, auto-attendant, and business hours in minutes.
5. Start calling — your number is live and accessible from any mobile device, desktop app, or browser.

Unlike traditional phone lines, virtual numbers scale with your business. Add lines, build ring groups, record calls, and review analytics — all from a single dashboard with no technician required. If you ever receive a suspicious call on your new number, you can report it directly through the FTC fraud report portal.

Conclusion

The 248 area code is far more than a dialing prefix — it is a marker of one of Michigan's most productive and dynamic regions, stretching from Troy's corporate corridors to Pontiac's revitalizing neighborhoods. Throughout this guide, you have learned which cities it covers, how Eastern Time applies to your calls, the code's history from its 1997 launch, the scam types most commonly associated with it, and what makes a 248 phone number so valuable for businesses targeting this market. Whether you are receiving a call or placing one, understanding the 248 area code puts you in a position of genuine advantage. Oakland County's business community rewards preparation, and knowing this code inside out is a meaningful first step.

If you are ready to build a real presence in southeastern Michigan, securing a local virtual 248 number is the single most practical move available to you. VoIP services eliminate the friction of setting up a physical office or waiting on a traditional carrier — you simply choose your number, activate it, and you are live in minutes. The Detroit suburbs represent one of the most attractive and accessible business markets in the entire Midwest, and a local number lets you compete on equal footing with businesses already established there. Take that next step today and put the power of a local 248 identity to work for your growth.