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Nassau County, New York, uses telephone area code 516 (international: +1 516). Suffolk County, the eastern part of Long Island, uses area code +1 631. The area codes exactly follow the county boundary.

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)

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11y ago

Suffolk County, New York (eastern Long Island) is area code +1 631.

Nassau County (western Long Island) is area code +1 516.

Note that, unlike most such situations, the area code boundaries exactly follow the county boundaries.

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)

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Q: What is the area code for Nassau County NY?
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