Area Code 620-427 located in LAMONT, GREENWOOD, KS, more detail is as below. Place NPA (Numbering Plan Area) : 620 NXX (Local Number Prefix) : 427 City : LAMONT County : GREENWOOD State : KS (Kansas) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 20073 LATA (Local Access Transport Area) : 532 Rate Center : MADISON ZIP Code Count : 6 ZIP Code Frequency : 9 ZIP Code : 66855 Other Information NPANXX : 620427 Switch CLLI (Common Language Location Identifier) : MDSNKSXADS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MADISON TELEPHONE, LLC-KS OCN (Operating Company Number) : 1801 Coverage Area Name : MADISON Latitude : 38.1387 Longitude : -96.1408 ‹ previous : 620-427 next › : 620-427 Telephone Number List 620-427-0000 ~ 620-427-9999