Area Code 443-855 located in ABERDEEN PROVING GROUND, HARFORD, MD, more detail is as below. Place NPA (Numbering Plan Area) : 443 NXX (Local Number Prefix) : 855 City : ABERDEEN PROVING GROUND County : HARFORD State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 2005-10-13 FIPS (Federal Information Processing Standards) : 24025 LATA (Local Access Transport Area) : 238 Rate Center : ABERDEEN ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 21005 Other Information NPANXX : 443855 County Population : 0 Switch CLLI (Common Language Location Identifier) : SLSPMDBCDS0 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 : LIGHTWAVE COMMUNICATIONS, LLC - MD OCN (Operating Company Number) : 5966 Coverage Area Name : ABERDEEN Latitude : 39.5091 Longitude : -76.1677 ‹ previous : 443-855 next › : 443-856 Telephone Number List 443-855-0000 ~ 443-855-9999