| District of Georgia area codes: 678 | |
|---|---|
| Country | United States |
| State/Province | Georgia |
| Major City | Atlanta |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 678-301 | Dekalb | Atlanta, GA | Us Lec Of Georgia |
| 678-302 | Cobb | Atlanta, GA | Xo Georgia |
| 678-303 | Cobb | Atlanta, GA | Xo Georgia |
| 678-304 | Clayton | Jonesboro, GA | Us Lec Of Georgia |
| 678-305 | Cobb | Atlanta, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-306 | Cobb | Atlanta, GA | Xo Georgia |
| 678-307 | Fulton | Atlanta, GA | Merryville Investments Ltd DBA Best Page |
| 678-308 | Lamar | Barnesville, GA | Powertel Atlanta Licenses |
| 678-309 | Cobb | Atlanta, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-310 | Cobb | Marietta, GA | Comcast Phone Of Georgia |
| 678-312 | Gwinnett | Lawrenceville, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-313 | Dekalb | Atlanta, GA | New Cingular Wireless PCS |
| 678-314 | Dekalb | Atlanta, GA | New Cingular Wireless PCS |
| 678-315 | Dekalb | Atlanta, GA | New Cingular Wireless PCS |
| 678-316 | Dekalb | Atlanta, GA | New Cingular Wireless PCS |
| 678-317 | Dekalb | Atlanta, GA | Xo Georgia |
| 678-318 | Gwinnett | Buford, GA | Us Lec Of Georgia |
| 678-319 | Dekalb | Atlanta, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-320 | Dekalb | Atlanta, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-321 | Carroll | Carrollton, GA | Us Lec Of Georgia |
There are 781 prefixes, In the code area, the major cities are Alpharetta, GA;Atlanta, GA;Candler-mcafee, GA;Coll. The major city is Atlanta.