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The 248 area code is a dialing number associated with Oakland County, which is located northwest of Detroit City and stands out as the second-most populous county of Michigan.

The 248 possesses a single overlay, the 947 area code that serves the same region. Both numbers surround not only Oakland County but also sections of Northville and Livonia, situated in Wayne County

Located in the Eastern Daylight time zone, the 248 area code encloses 2 counties and more than 40 cities in Michigan, including Troy, Farmington Hills, Southfield, Rochester Hills, and Royal Oak.

1. History

The Bell System and AT&T put in service the 248 area code on October 5, 1997, as a split from the prefix 810 installed on December 1, 1993

Initially, the 810 area code used to run in Oakland, Macomb, Genesee, Lapeer, St. Clair, and Sanilac counties. Since the activation of the dialing code 248, the 810 reduced its coverage radius to some portions of Oakland County, while the new prefix 248 surrounded almost the entire region. 

Three years later of the introduction of the 248 area code, the 947 area code arrived at the county as an overlay. Approved in 2001 and activated on January 26, 2002, the 947 area code represented a long-term solution for the saturation conflict of Michigan’s telephone network

The installation of the 947 area code to the telecommunication system made ten-digit dialing (area code+ 7 numbers) obligatory in the zone. Currently, there’s no project of a second overlay plan for the prefix 248. 

2. Location

Admitted on January 26, 1837, Michigan is the 26th state included in the union. This state is constituted by 83 counties and 533 incorporated municipalities consisting of cities, villages, and townships. 

Established in the Great Lakes Region and upper Midwestern side of the country, Michigan is the 10th most populous state of the US, encompassing over 10 million inhabitants. Also, covering a total area of 96,716 square miles, it appears as the 11th largest province of the territory. 

Michigan’s city-state capital is Lansing, situated in Ingham County. On the other hand, the largest and most populous municipality is Detroit city, surrounding 142.89 square miles and enclosing more than 3 million residents

The 248 area code possesses 91 non-unique postal area zip codes and covers 994.47 square miles.

3. Adjacent codes

Michigan State contains 12 area codes, being the number 734 the most populated code, serving around 1.4 million of the state’s 10 million people. This dialing code belongs to southeastern Michigan and is the only codification running in the region. 

This state owns three original numbers assigned in 1947, forming part of the 86 initial area codes in the North American Numbering Plan. They are the prefix 313 located in southeast Michigan, the 616 code situated in the upper peninsula, and the 517 dialing code associated with a south-central portion of the lower peninsula of Michigan. 

In Contrast, the newest codification added to the network is the 947 area code, installed in 2002. Another relevant prefix is the 810 code, which is used to cover the service area of the number 248. 

4. Most Important Cities in the 248 Area Code


Settled in 1819 and incorporated in 1955, Troy is a northern suburb belonging to the Detroit metropolitan area. This city is about 6 miles north of Detroit and covers a total area of 33.63 square miles

Possessing a population estimated at 84k inhabitants, Troy is the most populous municipality in Oakland County and the 13th most populated city of Michigan. The financial and commercial sectors are the most relevant areas in the city, encompassing several malls, banks, and other companies. 

Served by the 248 area code, Troy owns 6 non-unique zip codes: 48007, 48083, 48084, 48085, 48098, and 48099. 

Farmington Hills

Included in the Detroit metropolitan area, Farmington Hills is the second-most populous city in Oakland County just behind Troy, and the 15th most populous in the whole state, with around 81k residents

Officially incorporated in 1973, this location is considered one of the safest cities in America. This municipality encompasses some important automotive centers and companies like Nissan Technical Center and Hitachi Automotive Systems Americas, Inc.

Enclosing a total area of 33.30 square miles, Farmington Hills disposes of 6 non-unique ZIP codes: 48331, 48332, 48333, 48334, 48335, and 48336. 


Situated in Oakland County, Southfield city surrounds a total area of 26.26 square miles and is home to more than 73k inhabitants, being the 20th most populated municipality of Michigan and the 4th most populous of the county. 

Organized in 1830 and incorporated as a city in 1958, Southfield shares part of its southern border with Detroit. This city includes several headquarters of internationally recognized corporations as Denso, Veoneer, and Peterson Spring. At the present, it stands out as one of the most significant business centers in the metropolitan Detroit area.

For its part, Southfield City encloses 6 non-unique ZIP codes: 48033, 48034, 48037, 48075, 48076, and 48086. 

5. Other Important Locations and ZIP Codes of the 248 Area Code

The 248 area code and its overlay (947) serve just 2 of the 3 Michigan’s counties: 


  • Oakland County: settled in 1819 and organized in 1820, Oakland covers a total area of 907 square miles and encompasses over 1.2 million people. Constituted by 62 municipalities, its county seat is the city of Pontiac and owns 86 ZIP codes


  • Livingston County: founded in 1833 and named by Edward Livingston, this county is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. Livingston is the 11th largest county in terms of population, being home to more than 189k residents. Its county seat and the most populous city is Howell and disposes of 12 ZIP codes

Main Postal and Shipping Services

  • US Post Office- Waterford Carrier Annex, Waterford Twp, MI,  +1 248-673-3343
  • United States Postal Service annex,  Troy, MI, - +1 248-524-6910
  • The UPS Store, Farmington Hills, MI, - +1 248-489-1011

6. FAQs


How many area codes are there in Oakland County?

Oakland County disposes 4 area codes for its entire region; they are the codes 248, 810, 947, and 313.

What is the original area code in Michigan?

 The original area codes established in Michigan are the prefix 313, 616, and 517.