Area codes in Alpharetta, Georgia
Alpharetta, Georgia uses 4 area codes — 770, 678, 470 and 943. The main Alpharetta area code is 770.
Area codes serving Alpharetta
Phone numbers in Alpharetta are written as ten digits — for example (770) 555-0190 — and fall in the Eastern Time zone.
How Alpharetta came to have 4 area codes
The original Alpharetta area code is 770, in service since 1995. As the area ran low on available numbers, overlay codes were added over the same region for new phone lines: 678 (1998), 470 (2010) and 943 (2022). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Alpharetta now uses all 4 codes and every local call is dialed with ten digits.
All Georgia area codes · Is a Alpharetta call a scam?
Nearby cities
- Roswell area codes
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More cities in Georgia
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- Warner Robins area codes
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Frequently asked questions
What is the area code for Alpharetta?
The main area code for Alpharetta, Georgia is 770. Alpharetta is now served by 4 area codes in total: 770, 678, 470, 943.
How many area codes does Alpharetta have?
Alpharetta has 4 area codes: 770, 678, 470, 943.
Why does Alpharetta have more than one area code?
As Alpharetta used up the numbers available in its original area code (770, in service since 1995), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Alpharetta number?
Dial all 10 digits — the area code (770 or 678 or 470 or 943) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.