Area Code 240-239 located in LEONARDTOWN, SAINT MARYS, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 239 City : LEONARDTOWN County : SAINT MARYS State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 2000-10-31 FIPS (Federal Information Processing Standards) : 24037 LATA (Local Access Transport Area) : 236 Rate Center : LEONARDTN ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 20650 Other Information NPANXX : 240239 County Population : 0 Switch CLLI (Common Language Location Identifier) : DMSCMDAGDS0 MSA CBSA (Core Based Statistical Area) : Lexington Park, MD MSA CBSA Code (Core Based Statistical Area) : 30500 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Overlay : L Company : CORE COMMUNICATIONS, INC. - MD OCN (Operating Company Number) : 2593 Coverage Area Name : LEONARDTOWN Latitude : 38.2926 Longitude : -76.6288 ‹ previous : 240-238 next › : 240-241 Telephone Number List 240-239-0000 ~ 240-239-9999