Area Code 618-388 located in OLNEY, RICHLAND, IL, more detail is as below. Place NPA (Numbering Plan Area) : 618 NXX (Local Number Prefix) : 388 City : OLNEY County : RICHLAND State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2004-05-02 FIPS (Federal Information Processing Standards) : 17159 LATA (Local Access Transport Area) : 978 Rate Center : OLNEY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 62450 Other Information NPANXX : 618388 Switch CLLI (Common Language Location Identifier) : LRVLILXE2MD Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : BITWISE COMMUNICATIONS, INC. - IL OCN (Operating Company Number) : 5800 Coverage Area Name : OLNEY Latitude : 38.7367 Longitude : -88.0814 ‹ previous : 618-387 next › : 618-389 Telephone Number List 618-388-0000 ~ 618-388-9999