Area Code Lookup
What Area Code Is Islip?
Area code 631 · New York
Islip uses area code 631. It is located in New York.
Area Code Serving Islip
Frequently Asked Questions
What area code is Islip?
Islip uses area code 631. It is located in New York.
How do I call Islip from outside the US?
To call Islip from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-631-XXX-XXXX). The +1 is the country code for all NANPA countries.