Area Code 231-546 located in GAYLORD, OTSEGO, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 546 City : GAYLORD County : OTSEGO State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26137 LATA (Local Access Transport Area) : 348 Rate Center : ELMIRA ZIP Code Count : 361 ZIP Code Frequency : 52 ZIP Code : 49735 Other Information NPANXX : 231546 County Population : 0 Switch CLLI (Common Language Location Identifier) : EMIRMIXJDS0 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 : ELMIRA Latitude : 45.0732 Longitude : -84.8171 ‹ previous : 231-546 next › : 231-547 Telephone Number List 231-546-0000 ~ 231-546-9999