Area Code 313-668 located in ANN ARBOR, WASHTENAW, MI, more detail is as below. Place NPA (Numbering Plan Area) : 313 NXX (Local Number Prefix) : 668 City : ANN ARBOR County : WASHTENAW State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 26161 LATA (Local Access Transport Area) : 340 Rate Center : DETROITZN6 ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 48103 Other Information NPANXX : 313668 County Population : 0 Switch CLLI (Common Language Location Identifier) : SFLDMIDN4MD MSA CBSA (Core Based Statistical Area) : Ann Arbor, MI MSA CBSA Code (Core Based Statistical Area) : 11460 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : TELNET WORLDWIDE, INC. OCN (Operating Company Number) : 4632 Coverage Area Name : MELVINDALE Latitude : 42.2988 Longitude : -83.1936 ‹ previous : 313-667 next › : 313-670 Telephone Number List 313-668-0000 ~ 313-668-9999