Area Code 231-340 located in ELMIRA, OTSEGO, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 340 City : ELMIRA County : OTSEGO State : MI (Michigan) NXX Use Type : Wireless NXX Intro Version : 2003-11-11 FIPS (Federal Information Processing Standards) : 26137 LATA (Local Access Transport Area) : 348 Rate Center : ELMIRA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49730 Other Information NPANXX : 231340 County Population : 0 Switch CLLI (Common Language Location Identifier) : TRCYMICQCM0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI OCN (Operating Company Number) : 6003 Coverage Area Name : ELMIRA Latitude : 45.0664 Longitude : -84.8525 ‹ previous : 231-339 next › : 231-341 Telephone Number List 231-340-0000 ~ 231-340-9999