Area Code 618-723 located in OLNEY, RICHLAND, IL, more detail is as below. Place NPA (Numbering Plan Area) : 618 NXX (Local Number Prefix) : 723 City : OLNEY County : RICHLAND State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 17159 LATA (Local Access Transport Area) : 978 Rate Center : NOBLE ZIP Code Count : 97 ZIP Code Frequency : 15 ZIP Code : 62450 Other Information NPANXX : 618723 Switch CLLI (Common Language Location Identifier) : NOBLILXERS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : FRONTIER NORTH, INC. - IL OCN (Operating Company Number) : 1015 Coverage Area Name : NOBLE Latitude : 38.6932 Longitude : -88.2295 ‹ previous : 618-722 next › : 618-723 Telephone Number List 618-723-0000 ~ 618-723-9999