Area Code 224-270 located in ROUND LAKE, LAKE, IL, more detail is as below. Place NPA (Numbering Plan Area) : 224 NXX (Local Number Prefix) : 270 City : ROUND LAKE County : LAKE State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2002-05-01 FIPS (Federal Information Processing Standards) : 17097 LATA (Local Access Transport Area) : 358 Rate Center : DEERFIELD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 60073 Other Information NPANXX : 224270 County Population : 0 Switch CLLI (Common Language Location Identifier) : DRFDILDFDS0 MSA CBSA (Core Based Statistical Area) : Chicago-Naperville-Joliet, IL-IN-WI MSA CBSA Code (Core Based Statistical Area) : 16980 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Overlay : L Company : MCI WORLDCOM COMMUNICATIONS, INC. - IL OCN (Operating Company Number) : 7196 Coverage Area Name : ROUND LAKE Latitude : 42.3554 Longitude : -88.0751 ‹ previous : 224-267 next › : 224-276 Telephone Number List 224-270-0000 ~ 224-270-9999