The 631 area code is located in the state of New York, and according to Intelius data, covers roughly 993,160 phone numbers and 1,482,095 listings across 796 prefixes.
This is a General Purpose Code, in service since November 1, 1999.
Area code 631 is part of an overlay complex shared with:
Area code 631 was split from area code 516.
Local and long-distance calls within area code 631 both require 10 digits dialing.
Have you received a call from a number with a 631 area code? Figure out who is calling you by performing a reverse phone lookup search. Intelius can provide you with a phone report that includes (when available) original line type and carrier, the number owner’s name, last known address and past addresses, age, possible relatives, and more.
| County Population (2025) | 1,398,939 |
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| County Population (2025) | 2,358,182 |
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| County Population (2025) | 1,546,090 |
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