678 Area Code – Time Zone, Location, History & Cities

Area code 678 is located in the Eastern time zone and serves the Atlanta, Georgia metropolitan area, including cities such as Atlanta, Sandy Springs, Roswell, Johns Creek, and Alpharetta. Established on January 6, 1998, it serves as an overlay sharing the region with area codes 404, 770, 470, and 943.

Where is area code 678?

Area code 678 serves the Atlanta, GA metro area. It includes the cities of Atlanta, Sandy Springs, Roswell, Johns Creek, and Alpharetta. It is an overlay for area code 770 and area code 404 and serves the combined area.

What time zone is area code 678?

The 678 area code is located in the Eastern timezone (America/New_York).

History

Creation: Area code 678 was put into service on January 6, 1998 and was the 228th area code in service. It was one of 21 area codes introduced in 1998. In 2010, area code 470 was created from 678. It was the 5th area code in the state of Georgia. Georgia currently has 10 area codes. It was created to relieve the pressure on the 770 area code as the numbers in 770 were being exhausted.

New/recent overlays: Area code 943 was recently added as on overaly to the 678 area code on March 15, 2022.

Mnemonics: Prior to 1995, the middle digit of area codes was restricted to a 0 or 1 which do not correspond to a letter on a phone’s dialing pad. So, only area codes created in 1995 or later can have a mnemonic. The mnemonics for area code 678 include MPT, MPU, MPV, MQT, MQU, MQV, MRT, MRU, MRV, MST, MSU, MSV, NPT, NPU, NPV, NQT, NQU, NQV, NRT, NRU, NRV, NST, NSU, NSV, OPT, OPU, OPV, OQT, OQU, OQV, ORT, ORU, ORV, OST, OSU, and OSV. Let us know if one of these mnemonics fits area code 678 so we can feature it.