Area Code 217-238 located in MASON, EFFINGHAM, IL, more detail is as below. Place NPA (Numbering Plan Area) : 217 NXX (Local Number Prefix) : 238 City : MASON County : EFFINGHAM State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1995-07-04 FIPS (Federal Information Processing Standards) : 17049 LATA (Local Access Transport Area) : 976 Rate Center : MATTOON ZIP Code Count : 1 ZIP Code Frequency : 25 ZIP Code : 62443 Other Information NPANXX : 217238 County Population : 0 Switch CLLI (Common Language Location Identifier) : MTONILXCDS0 MSA CBSA (Core Based Statistical Area) : Effingham, IL MSA CBSA Code (Core Based Statistical Area) : 20820 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : ILLINOIS CONSOLIDATED TELEPHONE CO. OCN (Operating Company Number) : 1037 Coverage Area Name : MATTOON Latitude : 39.4812 Longitude : -88.3755 ‹ previous : 217-237 next › : 217-238 Telephone Number List 217-238-0000 ~ 217-238-9999