🇺🇸 678 area code
Area code 678 covers Alpharetta, Lawrenceville, Cumming and Atlanta and the surrounding area in Georgia. It shares that territory with 404, 470, 770 and 943, so the same neighbourhood can have numbers in any of them. Enter a 678 number below for a free check before you call back.
- Location: Alpharetta, Georgia
- Time zone: Eastern (UTC−5)
- In service since January 6, 1998
番号を調べる
1 回目の照会で、有効性・通信事業者・回線種別・地域が分かります。
Area code 678 at a glance
- Area code
- 678
- Location
- Georgia, United States
- Main cities
- Alpharetta, Lawrenceville, Cumming, Atlanta, Duluth, Covington
- Time zone
- Eastern (UTC−5)
- Local time now
- —
- In service since
- January 6, 1998
- Created from
- 470
- Overlay codes
- 404, 470, 770, 943
- Codes split from it
- 470
- Local calls
- Dial 10 digits
- Number format
- (678) 555-0123
- From abroad
- +1 678 555 0123
Cities in area code 678
- Alpharetta
- Lawrenceville
- Cumming
- Atlanta
- Duluth
- Covington
- Marietta
- Roswell
- Stockbridge
- Canton
Is a 678 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so a 678 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing a 678 number to people in Georgia because a local-looking call is more likely to be answered. If a 678 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 678
678 entered service on January 6, 1998, as an overlay on 470, which had run short of numbers.
It is part of the 404/470/678/770/943 overlay: the codes cover the same area, and a new line there can be given a number in any of them. Two neighbours — or two phones in one household — can have different area codes. That is also why local calls need the full ten digits.
As the region grew, 470 was carved out of or added to 678.
Area codes
More area codes in Georgia
All Georgia area codes · Every North American area code · International country codes
よくある質問
Area code 678 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 678?
Area code 678 is in Georgia, United States. It covers Alpharetta, Lawrenceville, Cumming, Atlanta, Duluth and Covington.
What time zone is area code 678?
678 is in the Eastern (UTC−5) time zone, and observes daylight saving time.
What area codes overlay 678?
404, 470, 770 and 943 serve the same area as 678. Numbers in all of them are local to one another.
When did area code 678 start?
678 entered service on January 6, 1998, created from 470.
How do I find out who called me from 678?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 678?
If you live in or near Georgia, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 678 callers who will not leave a message are best looked up before you call back.