Area Code 240-712 located in COLUMBIA, HOWARD, MD, more detail is as below. Place NPA (Numbering Plan Area) : 240 NXX (Local Number Prefix) : 712 City : COLUMBIA County : HOWARD State : MD (Maryland) NXX Use Type : Wireless NXX Intro Version : 11/1/2011 FIPS (Federal Information Processing Standards) : 24027 LATA (Local Access Transport Area) : 238 Rate Center : LAUREL238 ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 21045 Other Information NPANXX : 240712 County Population : 0 MSA CBSA (Core Based Statistical Area) : Baltimore-Towson, MD MSA CBSA Code (Core Based Statistical Area) : 12580 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Overlay : L Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD OCN (Operating Company Number) : 6395 Coverage Area Name : COLUMBIA Latitude : 39.1874 Longitude : -76.8396 ‹ previous : 240-708 next › : 240-713 Telephone Number List 240-712-0000 ~ 240-712-9999