Area Code 231-271 located in NORTHPORT, LEELANAU, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 271 City : NORTHPORT County : LEELANAU State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26089 LATA (Local Access Transport Area) : 348 Rate Center : SUTTONSBAY ZIP Code Count : 46 ZIP Code Frequency : 2 ZIP Code : 49670 Other Information NPANXX : 231271 County Population : 0 Switch CLLI (Common Language Location Identifier) : STBYMIXIRS1 MSA CBSA (Core Based Statistical Area) : Traverse City, MI MSA CBSA Code (Core Based Statistical Area) : 45900 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : CENTURYTEL OF MICHIGAN INC DBA CENTURYLINK OCN (Operating Company Number) : 0702 Coverage Area Name : SUTTONS BAY Latitude : 44.9757 Longitude : -85.6487 ‹ previous : 231-271 next › : 231-271 Telephone Number List 231-271-0000 ~ 231-271-9999