Area Code 516-991 located in ISLANDIA, SUFFOLK, NY, more detail is as below. Place NPA (Numbering Plan Area) : 516 NXX (Local Number Prefix) : 991 City : ISLANDIA County : SUFFOLK State : NY (New York) NXX Use Type : Wireless NXX Intro Version : 1999-10-13 FIPS (Federal Information Processing Standards) : 36103 LATA (Local Access Transport Area) : 132 Rate Center : CENTRAISLP ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 11749 Other Information NPANXX : 516991 County Population : 0 Switch CLLI (Common Language Location Identifier) : WBYNNYAKCM4 MSA CBSA (Core Based Statistical Area) : New York-Northern New Jersey-Long Island, NY-NJ-PA MSA CBSA Code (Core Based Statistical Area) : 35620 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : SPRINT SPECTRUM L.P. OCN (Operating Company Number) : 6664 Coverage Area Name : CENTRAL ISLIP Latitude : 40.7905 Longitude : -73.2007 ‹ previous : 516-988 next › : 516-992 Telephone Number List 516-991-0000 ~ 516-991-9999