Area Code 517-203 located in EAST LANSING, INGHAM, MI, more detail is as below. Place NPA (Numbering Plan Area) : 517 NXX (Local Number Prefix) : 203 City : EAST LANSING County : INGHAM State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2000-06-13 FIPS (Federal Information Processing Standards) : 26065 LATA (Local Access Transport Area) : 346 Rate Center : LANSING ZIP Code Count : 586 ZIP Code Frequency : 93 ZIP Code : 48823 Other Information NPANXX : 517203 County Population : 0 Switch CLLI (Common Language Location Identifier) : ELNSMIMNOS0 MSA CBSA (Core Based Statistical Area) : Lansing-East Lansing, MI MSA CBSA Code (Core Based Statistical Area) : 29620 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : AMERITECH MICHIGAN OCN (Operating Company Number) : 9323 Coverage Area Name : LANSING Latitude : 42.7363 Longitude : -84.4879 ‹ previous : 517-203 next › : 517-204 Telephone Number List 517-203-0000 ~ 517-203-9999