Area code 404 is a telephone area code in the North American Numbering Plan (NANP) for Atlanta, Georgia and its closest suburbs. This comprises roughly the area encircled by Interstate 285. It is an enclave area code, surrounded by area code 770, which serves most of Metropolitan Atlanta.
Now, area code 404 is located in Atlanta and serves Clayton, DeKalb, Fulton, Cobb, Douglas, and Gwinnett counties. This code also roughly covers the area encircled by Interstate 285, a major interstate highway loop connecting I-20, I-75, and I-85.