Area Code 410-521 located in WOODSTOCK, HOWARD, MD, more detail is as below. Place NPA (Numbering Plan Area) : 410 NXX (Local Number Prefix) : 521 City : WOODSTOCK County : HOWARD State : MD (Maryland) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 24027 LATA (Local Access Transport Area) : 238 Rate Center : RANDALLSTN ZIP Code Count : 86 ZIP Code Frequency : 3 ZIP Code : 21163 Other Information NPANXX : 410521 Switch CLLI (Common Language Location Identifier) : RNTWMDRADS0 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 Company : VERIZON MARYLAND, INC. OCN (Operating Company Number) : 9212 Coverage Area Name : RANDALLSTOWN Latitude : 39.3628 Longitude : -76.7823 ‹ previous : 410-521 next › : 410-521 Telephone Number List 410-521-0000 ~ 410-521-9999