| District of Georgia area codes: 678 | |
|---|---|
| Country | United States |
| State/Province | Georgia |
| Major City | Atlanta |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 678-382 | Dekalb | Atlanta, GA | Southern Digital Network DBA Fdn Comms |
| 678-383 | Cobb | Marietta, GA | Level 3 Communications |
| 678-384 | Cobb | Marietta, GA | Level 3 Communications |
| 678-385 | Cobb | Marietta, GA | Us Lec Of Georgia |
| 678-386 | Dekalb | Atlanta, GA | New Cingular Wireless PCS |
| 678-387 | Dekalb | Atlanta, GA | Teleport Communications Atlanta |
| 678-388 | Cobb | Marietta, GA | Broadwing Communicaitons |
| 678-389 | Dekalb | Atlanta, GA | Level 3 Communications |
| 678-390 | Carroll | Carrollton, GA | Dovetel Communications |
| 678-391 | Cobb | Marietta, GA | Level 3 Communications |
| 678-392 | Dekalb | Atlanta, GA | Level 3 Communications |
| 678-393 | Dekalb | Atlanta, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-394 | Cobb | Atlanta, GA | Tw Telecom Of Georgia Lp |
| 678-395 | Dekalb | Atlanta, GA | Broadwing Communicaitons |
| 678-396 | Cobb | Atlanta, GA | Bellsouth Telecomm Inc DBA Southern Bell Tel & |
| 678-397 | Dekalb | Atlanta, GA | Cbeyond Communications |
| 678-398 | Cobb | Marietta, GA | Level 3 Communications |
| 678-399 | Fulton | Atlanta, GA | Alec |
| 678-400 | Hall | Clermont, GA | Charter Fiberlink - Georgia |
| 678-401 | Cobb | Atlanta, GA | Xo 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.