770 Area Code
Atlanta suburbs, Georgia
Area code 770 is located in Atlanta suburbs, Georgia. It covers Marietta, Roswell, and surrounding areas in the Eastern time zone (UTC-5). Administered by NANPA.
Where is area code 770?
Area code 770 is located in Atlanta suburbs, Georgia. It covers Marietta, Roswell, and surrounding areas in the Eastern time zone (UTC-5).
Area code 770 is overlaid by area code 678. Both codes serve the same geographic region and require 10-digit dialing for local calls.
Cities Covered by Area Code 770
Area code 770 primarily serves the Atlanta suburbs area of Georgia. The exact coverage includes Marietta, Roswell, and Alpharetta, along with surrounding communities and suburbs.
Time Zone
Eastern Time — UTC-5
Area code 770 operates in the Eastern Time Zone. When calling 770 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 770
Area code 770 was introduced in 1995 as a geographic area code serving Atlanta suburbs, Georgia. As demand for phone numbers grew, overlay code 678 was added to the same region, requiring 10-digit dialing for local calls. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.