According to North American Numbering Plan, 631778 located in CENTRAL ISLIP, New York. the first three digits 631 locate to state New York, 778 locate the city CENTRAL ISLIP, furthermore, we also provide some other information such as the zip code example(s) 11722, 11749, carrier ALLEGIANCE TELECOM, INC. - NY, and the latitude and longitude is 40.7905 -73.2007. Please pay attention that the detail we provide only as a reference, the details of the zip code may be not complete, the latitude and longitude likely to have deviation.

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