Area Code 302-663 located in MILLSBORO, SUSSEX, DE, more detail is as below. Place NPA (Numbering Plan Area) : 302 NXX (Local Number Prefix) : 663 City : MILLSBORO County : SUSSEX State : DE (Delaware) NXX Use Type : Landline NXX Intro Version : 2000-06-13 FIPS (Federal Information Processing Standards) : 10005 LATA (Local Access Transport Area) : 228 Rate Center : MILLSBORO ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 19966 Other Information NPANXX : 302663 County Population : 0 Switch CLLI (Common Language Location Identifier) : PHLBPABJDS3 MSA CBSA (Core Based Statistical Area) : Seaford, DE MSA CBSA Code (Core Based Statistical Area) : 42580 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : ATX TELECOMMUNICATIONS SERVICES, LTD OCN (Operating Company Number) : 7757 Coverage Area Name : MILLSBORO Latitude : 38.5902 Longitude : -75.2891 ‹ previous : 302-663 next › : 302-664 Telephone Number List 302-663-0000 ~ 302-663-9999