Area codes in Atlantic City, New Jersey

Atlantic City, New Jersey uses 2 area codes — 609 and 640. The main Atlantic City area code is 609.

Area codes serving Atlantic City

Phone numbers in Atlantic City are written as ten digits — for example (609) 555-0190 — and fall in the Eastern Time zone.

How Atlantic City came to have 2 area codes

The original Atlantic City area code is 609, in service since 1957. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 640 (2018). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Atlantic City now uses all 2 codes and every local call is dialed with ten digits.

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Nearby cities

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Frequently asked questions

What is the area code for Atlantic City?

The main area code for Atlantic City, New Jersey is 609. Atlantic City is now served by 2 area codes in total: 609, 640.

How many area codes does Atlantic City have?

Atlantic City has 2 area codes: 609, 640.

Why does Atlantic City have more than one area code?

As Atlantic City used up the numbers available in its original area code (609, in service since 1957), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.

How do you dial a Atlantic City number?

Dial all 10 digits — the area code (609 or 640) 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.