Area Code 217-984 located in MASON CITY, MASON, IL, more detail is as below. Place NPA (Numbering Plan Area) : 217 NXX (Local Number Prefix) : 984 City : MASON CITY County : MASON State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2003-02-09 FIPS (Federal Information Processing Standards) : 17125 LATA (Local Access Transport Area) : 366 Rate Center : MDLTNNWHLD ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 62664 Other Information NPANXX : 217984 County Population : 0 Switch CLLI (Common Language Location Identifier) : BLTNILATPMD Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : LEVEL 3 COMMUNICATIONS, LLC - IL OCN (Operating Company Number) : 6115 Coverage Area Name : MIDDLETOWN Latitude : 40.1393 Longitude : -89.5799 ‹ previous : 217-983 next › : 217-984 Telephone Number List 217-984-0000 ~ 217-984-9999