Published: January 27, 2015
Suffolk County on New York's Long Island will have a new area code in 2016. Currently, all of Suffolk County (some larger communities: Babylon, Brookhaven, Southhampton) is served by area code 631. In December, 2014 the New York State Public Service Commission approved overlay code 934 which will serve the same area currently covered by NPA 631.
Mandatory 10 digit dialing will be used for all local calls in the area from June 18, 2016.
See official NANPA announcement and area code map (PDF document).
Visit area code 934 page for a list of cities served, map and other info.