Area Code 305-393 located in MARATHON, MONROE, FL, more detail is as below. Place NPA (Numbering Plan Area) : 305 NXX (Local Number Prefix) : 393 City : MARATHON County : MONROE State : FL (Florida) NXX Use Type : Wireless NXX Intro Version : 1995-07-04 FIPS (Federal Information Processing Standards) : 12087 LATA (Local Access Transport Area) : 460 Rate Center : KEYS ZIP Code Count : 1 ZIP Code Frequency : 17 ZIP Code : 33050 Other Information NPANXX : 305393 County Population : 0 Switch CLLI (Common Language Location Identifier) : PRRNFLAECM1 MSA CBSA (Core Based Statistical Area) : Key West, FL MSA CBSA Code (Core Based Statistical Area) : 28580 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC - GA OCN (Operating Company Number) : 6214 Coverage Area Name : ISLAMORADA Latitude : 24.9143 Longitude : -80.6498 ‹ previous : 305-393 next › : 305-393 Telephone Number List 305-393-0000 ~ 305-393-9999