678 Area Code — Atlanta, GA
Area code 678 serves Atlanta and 3 other cities in Georgia. Local time follows America/New_York. It overlays with 404, 470, 770, so 10-digit dialling is required.
- State
- Georgia
- Primary city
- Atlanta
- Timezone
- America/New_York
- In service since
- 1998
- Type
- Overlay
Overlay of metro Atlanta
Cities Served by 678
The 678 area code covers 4 cities and communities in Georgia.
- Atlanta
- Marietta
- Roswell
- Sandy Springs
About Area Code 678
Area code 678 is a North American Numbering Plan (NANP) area code that has been in service since 1998. It is administered by NANPA on behalf of the FCC and serves the Georgia region anchored on Atlanta.
678 is an overlay code, which means it shares its geographic boundaries with one or more existing area codes (404, 470, 770). Overlays are created when a region exhausts the supply of phone numbers in its original area code. Within an overlay region, residents must dial all 10 digits even for local calls, because the same 7-digit number can exist under multiple area codes.
Mobile numbers in 678 are portable: a person who moved away from Atlanta may still carry a 678 mobile number on their device. If you receive an unexpected call from a 678 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Georgia, you may also interact with neighbouring or overlay codes (404, 470, 770). See the related codes section below to explore the rest of Georgia.
Other Georgia Area Codes
Continue exploring the Georgia numbering plan.
678 Area Code FAQ
Where is area code 678?
Area code 678 is located in Georgia, primarily serving Atlanta and surrounding cities including Marietta, Roswell, Sandy Springs. The region operates on ET (America/New_York) time.
What state is 678 area code?
678 is a Georgia area code. It was put into service in 1998 as an overlay and shares its geographic footprint with overlay codes 404, 470, 770.
Is 678 a scam area code?
678 is a legitimate North American area code allocated by NANPA to Georgia. Like any geographic area code, scammers sometimes spoof 678 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 678 use?
Area code 678 operates on ET (America/New_York). Numbers in this area code follow standard Georgia time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 678 phone number?
Yes. Use the reverse lookup widget above to enter a full 678 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.
What's the difference between 678 and 404?
678 and 404 cover the same Georgia geographic area as overlay codes. Calls between them are local, but you must dial all 10 digits. New phone numbers in this region are assigned from either pool depending on what's available with the carrier at signup.