What Is Area Code 678?
Area code 678 is a geographic telephone area code in the North American Numbering Plan (NANP) serving the Atlanta metropolitan area and surrounding communities in Georgia.
The area code was introduced in 1998 to provide additional telephone-number capacity as the Atlanta region continued to grow. Unlike a traditional geographic split, 678 was added as an overlay to the existing 404 and 770 numbering regions. This means 678 numbers can be assigned across the same broad metropolitan territory rather than being restricted to a separate geographic section.
The Atlanta region has since added two more overlay codes: 470 in 2010 and 943 in 2022. All four overlay codes 678, 470, 943, and the underlying 404/770 numbering regions serve overlapping parts of the greater Atlanta market. The Georgia Public Service Commission approved 943 as another overlay because of continued demand for telephone numbers across metro Atlanta.
- State: Georgia
- Primary City: Atlanta
- Other Major Cities: Marietta, Roswell, Alpharetta, Sandy Springs, Lawrenceville, Duluth, Gainesville, Decatur
- Time Zone: Eastern Time (ET)
- Introduced: 1998
- Overlay Area Codes: 404, 470, 770, 943
- Region: Atlanta metropolitan area and surrounding communities
- Primary Uses: Residential and mobile phone service, business communications, technology, finance, logistics, healthcare, education, professional services, retail, hospitality, and local government
What Time Zone Is Area Code 678 In?
Area code 678 is entirely within the Eastern Time Zone (ET).
- Eastern Standard Time (EST): UTC−5
- Eastern Daylight Time (EDT): UTC−4 during daylight saving time
This applies throughout the 678 service area, including Atlanta, Marietta, Alpharetta, Roswell, Sandy Springs, Lawrenceville, Gainesville, Decatur, and surrounding communities.
Population & Demographics of Area Code 678
Telephone area-code boundaries do not correspond perfectly to city or county boundaries, so there is no single U.S. Census population figure specifically assigned to area code 678.
Current AT&T data associates the 678 service territory with 29 Georgia counties, with a combined population of approximately 5.5 million people based on 2023 U.S. Census data for the counties served. Because many counties are served only in part, this figure represents the broader geographic population associated with the area code rather than an exact count of people with 678 numbers.
The region is centered on the Atlanta metropolitan economy, one of the largest business and population centers in the Southeast.
- Estimated Regional Population: Approximately 5.5 million residents
- Average Household Size: Approximately 2.7 people
- Gender Distribution: Approximately 51.24% are female, and 48.76% are male
- Region: Metro Atlanta and surrounding north and central Georgia communities
- Largest Population Center: Atlanta
- Other Major Population Centers: Marietta, Roswell, Alpharetta, Sandy Springs, Lawrenceville, Decatur, Gainesville, and Peachtree City
- Major Industries: Technology, finance, logistics, transportation, healthcare, media, professional services, manufacturing, retail, hospitality, and telecommunications
- Population Density: Highest in Atlanta and the surrounding suburban counties
- Regional Characteristics: Large metropolitan employment centers, suburban communities, major transportation networks, diverse residential areas, and rapidly developing commercial districts
County and City Covered by Area Code 678
Current AT&T data identifies 29 Georgia counties served in whole or in part by area code 678: Barrow, Bartow, Butts, Carroll, Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gordon, Gwinnett, Hall, Haralson, Henry, Lamar, Meriwether, Newton, Oconee, Paulding, Pickens, Pike, Polk, Rockdale, Spalding, and Walton counties. Because area-code and county boundaries do not always match, not every telephone number within each county necessarily uses 678.
Here are the major counties and communities associated with Area Code 678:
History & Background of Area Code 678
Area code 678 was introduced in 1998 to provide additional telephone-number capacity for the rapidly growing Atlanta metropolitan area. Rather than dividing the region geographically, Georgia regulators chose an overlay, allowing the new 678 code to serve the same territory as the existing 404 and 770 area codes. NANPA's original planning letter confirms that the 678 overlay became effective on January 6, 1998, while existing 404 and 770 customers kept their numbers.
- January 6, 1998 – Area Code 678 Created: 678 was placed into service as an overlay covering the combined 404 and 770 numbering regions. It was created to provide additional numbers as telephone-number demand increased across metro Atlanta.
- 1998 – 10-Digit Dialing Introduced: Because 678 shared the same geographic territory with 404 and 770, seven-digit dialing could no longer reliably identify the destination area code. Mandatory 10-digit local dialing was therefore implemented across the Atlanta overlay region beginning January 1, 1998.
- 2010 – Area Code 470 Added: Continued growth in the Atlanta metropolitan area led to another overlay. Area code 470 was added to the existing 404, 678, and 770 numbering complex, providing another pool of telephone numbers without requiring a geographic split. NANPA records the 470 overlay as taking effect in 2010.
- March 15, 2022 – Area Code 943 Added: With continued demand for telephone numbers across metro Atlanta, the Georgia Public Service Commission approved 943 as another overlay for the existing 404/470/678/770 region. New 943 numbers became available beginning March 15, 2022.
- Today – 678 Remains Active: Area code 678 continues to operate as part of the greater Atlanta overlay complex alongside 404, 470, 770, and 943. NANPA's current numbering data lists 678 within this five-code overlay complex and confirms that 10-digit dialing is required.
Why Local Numbers Build Trust
Because 678 is an established Atlanta-area code, customers across the metro region may recognize it as a local number. However, a local area code does not prove that a company is physically located in Atlanta, and caller ID can be spoofed.
Make Business Calls Locally Recognizable
Customers throughout metro Atlanta regularly encounter 678 numbers from local businesses, service providers, healthcare practices, professional firms, and other organizations.
Using a 678 number can make an outbound call look familiar to customers who already recognize the area code.
Build a Consistent Local Presence
A 678 number can help a business maintain an Atlanta-area identity even when its employees work remotely or calls are handled from a centralized office.
This is useful for companies that serve customers throughout multiple Atlanta suburbs but want one recognizable local contact number.
Keep Local Contact Information Consistent
Using the same local business number across a company's website, Google Business Profile, directories, advertisements, social media profiles, and customer communications makes the business easier to recognize.
A local area code can support customer familiarity, but it should not be presented as a guaranteed local SEO ranking factor.
Serve the Greater Atlanta Market With One Number
The 678 service area covers a broad metropolitan market, from Atlanta and its inner suburbs to communities such as Alpharetta, Marietta, Lawrenceville, Gainesville, Newnan, and Griffin.
A business serving customers across this region can use a single local 678 number rather than maintaining separate phone identities for every city.
Benefits of Using GoodCall for 678 Area Code Businesses
GoodCall combines a local business phone number with an AI-powered phone system that can answer inbound calls, capture customer information, handle routine questions, route callers, and support appointment scheduling.
For businesses operating in a large and competitive market like metro Atlanta, an AI phone agent can help provide consistent call coverage without requiring employees to answer every routine call manually.
24/7 AI Call Answering With a Voice Agent
Goodcall's AI phone agent can answer inbound calls around the clock, including evenings, weekends, holidays, and periods when employees are unavailable.
This can help businesses reduce missed calls when staff are busy with customers or outside normal operating hours.
Intelligent Lead Capture & Qualification
The AI phone agent can collect caller details and determine the reason for the call before routing relevant information to the business.
For example, an Atlanta-area home service company can collect a customer's name, contact information, service request, and preferred appointment time before sending the inquiry to the appropriate team.
Automated Appointment Scheduling
Goodcall supports appointment scheduling workflows, allowing callers to complete common booking interactions without waiting for an employee.
This can be useful for healthcare practices, salons, professional services, home service companies, automotive businesses, and other appointment-driven organizations.
Call Forwarding and Business Integrations
Businesses can configure call forwarding and connect their GoodCall number with supported communication and business workflows.
This allows a company to keep a public-facing 678 number while calls can be handled by employees working from different locations.
Call Recording & Caller Analytics
GoodCall provides call and customer information that businesses can use to understand customer interactions and identify recurring reasons for inbound calls.
These insights can help businesses identify missed opportunities, frequently asked questions, and areas where their phone workflows could be improved.
How to Get a 678 Area Code Phone Number With GoodCall
Businesses serving Atlanta, Marietta, Alpharetta, Roswell, Lawrenceville, or other communities in the metro Atlanta region can use GoodCall to configure a local 678 business number, subject to number availability.
- Create Your Account: Enter your business information and begin configuring your phone agent.
- Choose Your Plan: Select a plan based on your expected call volume and workflow requirements.
- Complete Verification: Provide any required business or identity information.
- Select a 678 Number: Choose an available 678 telephone number if one is available.
- Configure the AI Agent: Add your business hours, FAQs, greetings, call-routing instructions, appointment rules, and other information the agent needs.
- Connect Your Workflows: Configure call forwarding and supported integrations.
- Test and Activate: Test common customer scenarios before publishing the number across your website and business listings.
Nearby Area Codes to 678
Area code 678 primarily serves the greater Atlanta region, where several area codes overlap geographically. Here are the nearby regions and their area codes:
